Which of the following organisms lives near the surface of aquatic biomes because it needs sunlight to survive?
a. phytoplankton
b. zooplankton
c. sturgeon
d. manatee

Phytoplankton.

Explanation:

Phytoplanktons are the small, microscopic organisms that lives near the surface of the aquatic biomes. Phytoplanktons are the algae that plays the similar role of terrestrial plants.

The phytoplanktons needs sunlight for their survival. Phytoplanktons also require the nutrients like sulfur and phosphorus that are used by them to produce carbohydrates and proteins.

Thus, the correct answer is option (a).

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.