Question

fill in the boxes with the appropriate terms:
animals release
into the atmosphere
through
atmosphere
plants absorb
from the atmosphere
through
animals absorb
from the atmosphere
through
atmosphere
plants release
into the atmosphere
through

Explanation:

Step1: Analyze animal processes

Animals perform respiration. During respiration, they take in oxygen ($O_2$) and release carbon dioxide ($CO_2$) into the atmosphere. So "Animals release" $\boldsymbol{CO_2}$ "into the atmosphere through" $\boldsymbol{respiration}$.

Step2: Analyze plant absorption

Plants take in carbon dioxide ($CO_2$) from the atmosphere to perform photosynthesis. So "Plants absorb" $\boldsymbol{CO_2}$ "from the atmosphere through" $\boldsymbol{photosynthesis}$.

Step3: Analyze animal absorption

Animals need oxygen ($O_2$) for respiration. They get oxygen from the atmosphere, typically through breathing (or respiration - but here the intake process for oxygen is often via breathing/gas exchange, and the release is respiration). So "Animals absorb" $\boldsymbol{O_2}$ "from the atmosphere through" $\boldsymbol{breathing}$ (or gas exchange, but respiration is the process that uses it; for intake, breathing is the mechanism).

Step4: Analyze plant release

Plants perform respiration too (in addition to photosynthesis). During respiration, they release oxygen ($O_2$) into the atmosphere? Wait, no - wait, plants do photosynthesis (absorb $CO_2$, release $O_2$) and respiration (absorb $O_2$, release $CO_2$). Wait, the diagram has two atmosphere arrows. Wait, let's re - clarify:

Wait, the carbon cycle and gas exchange:

• Animals: Respiration - take in $O_2$ (absorb from atmosphere through breathing), release $CO_2$ (through respiration) into atmosphere.

• Plants: Photosynthesis - absorb $CO_2$ (from atmosphere through photosynthesis), release $O_2$ (through respiration? No, photosynthesis releases $O_2$, respiration releases $CO_2$ for plants. Wait, the lower atmosphere arrow from plants to atmosphere: plants release $O_2$ through photosynthesis? Wait, no, photosynthesis produces $O_2$ as a by - product, which is released into the atmosphere. Respiration in plants releases $CO_2$. But the diagram has two atmosphere connections. Let's correct:

Wait, the correct processes:

1. Animals:

• Absorb: $O_2$ from atmosphere through breathing (or gas exchange in lungs/gills etc.).
• Release: $CO_2$ into atmosphere through respiration.

1. Plants:

• Absorb: $CO_2$ from atmosphere through photosynthesis.
• Release: $O_2$ into atmosphere through photosynthesis (as a by - product) and $CO_2$ through respiration. But looking at the diagram, the lower arrow from plants to atmosphere: probably $O_2$ through photosynthesis? Wait, no, the diagram has two atmosphere boxes. Let's re - structure:

Let's list all boxes:

• Animals release [ ] into atmosphere through [ ]: $CO_2$, respiration.

• Plants absorb [ ] from atmosphere through [ ]: $CO_2$, photosynthesis.

• Animals absorb [ ] from atmosphere through [ ]: $O_2$, breathing (or respiration - but intake is breathing).

• Plants release [ ] into atmosphere through [ ]: $O_2$, photosynthesis (or $CO_2$ through respiration). But given the carbon - oxygen cycle, the main exchanges:

Animals:

• Absorb $O_2$ (from atmosphere) through breathing.
• Release $CO_2$ (to atmosphere) through respiration.

Plants:

• Absorb $CO_2$ (from atmosphere) through photosynthesis.
• Release $O_2$ (to atmosphere) through photosynthesis.

Answer:

• Animals release $\boldsymbol{CO_2}$ into the atmosphere through $\boldsymbol{respiration}$.
• Plants absorb $\boldsymbol{CO_2}$ from the atmosphere through $\boldsymbol{photosynthesis}$.
• Animals absorb $\boldsymbol{O_2}$ from the atmosphere through $\boldsymbol{breathing}$.
• Plants release $\boldsymbol{O_2}$ into the atmosphere through $\boldsymbol{photosynthesis}$. (Or, for the plant release of $CO_2$, it would be through respiration, but the diagram's lower arrow is likely for $O_2$ from photosynthesis to balance the cycle)