Question

what happens in a photic part of a body of water?
a. water flows in and out quickly.
b. the water is stagnant.
c. there is no photosynthesis.
d. plants grow quickly.

Explanation:

The photic zone is the upper layer of water where sunlight penetrates. Sunlight is essential for photosynthesis. Since plants rely on photosynthesis for growth, in the photic zone (where there is sufficient light), plants can grow quickly.

• Option A: Water flow in and out quickly is not a characteristic of the photic zone. The photic zone is defined by light availability, not water flow rate.
• Option B: Stagnant water is not related to the photic zone. The photic zone is about light penetration, not water movement (or lack thereof).
• Option C: Photosynthesis occurs in the photic zone because sunlight is present. So, this option is incorrect.
• Option D: As explained above, with sunlight (a key requirement for photosynthesis) available in the photic zone, plants (which perform photosynthesis) can grow quickly.

Answer:

D. Plants grow quickly.