Question

all living organisms are made of carbon. carbon is also constantly being added to and removed from the atmosphere. during photosynthesis, for example, plants extract carbon from the atmosphere, along with water and sunlight, and turn it into sugar and oxygen for nourishment. as a result of photosynthesis, carbon is taken out of the atmosphere. in contrast, burning fossil fuels such as oil and coal leads to the release of carbon into the atmosphere in the form of carbon dioxide. carbon dioxide is a greenhouse gas that acts as a blanket, trapping heat around earth. humans have burned so many fossil fuels that there is more carbon dioxide in the atmosphere than there used to be. due to this increase in carbon dioxide, earth has become warmer.
match causes with their effects.
an excess of carbon dioxide is present in the atmosphere. fossil fuels burn.
photosynthesis takes place.
cause effect
carbon is removed from the atmosphere.
carbon enters the atmosphere.
earth is warmer.

Explanation:

• For "Photosynthesis takes place", the text says "During photosynthesis...carbon is taken out of the atmosphere", so the effect is "Carbon is removed from the atmosphere".
• For "Fossil fuels burn", it's stated that "burning fossil fuels...leads to the release of carbon into the atmosphere", so the effect is "Carbon enters the atmosphere".
• For "An excess of carbon dioxide is present in the atmosphere", the text mentions "Due to this increase in carbon dioxide, Earth has become warmer", so the effect is "Earth is warmer".

Answer:

Cause: Photosynthesis takes place. Effect: Carbon is removed from the atmosphere.
Cause: Fossil fuels burn. Effect: Carbon enters the atmosphere.
Cause: An excess of carbon dioxide is present in the atmosphere. Effect: Earth is warmer.