Answer:
Plankton are producers therefore they use the CO2 in the atmosphere and convert it to oxygen. Whales eat the plankton while sometimes using the oxygen that the plankton produces. In this situation, the whale is a primary consumer, or a heterotroph, as the plankton is the producer, or autotroph. Hope this helped :D
Answer:
Limiting Factors : Anything that can limit the size of a population, including living and nonliving features of an ecosystem, such as predators or drought.
Answer:
I think the answer would be A.
Answer: C is the answer
do some research about the topic