Question 1
Most marine animals live near the surface of the ocean because of ________, which supports photosynthesis by marine algae that form the basis of the food chain.
◦ warmer temperatures
◦ thermocline
◦ sunlight
◦ air
Question 2
One disadvantage to living near the surface of the ocean is ________.
◦ maneuvering in the water can be difficult and make it a problem to avoid predators
◦ waves create difficulty in finding abundant food
◦ too many other marine organisms live near the surface so competition for food is difficult
◦ strong currents bring rapid changes to the environment