Why are some ecosystems more productive then others?
a. some ecosystems work harder than others
b. certain ecosystems receive from humans
c. some ecosystems have more nutrients available than others

C

Explanation:

Depending on the location, climate, polluted conditions, and etc. of an ecosystem, it can vary what nutrients they have available.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

answer///multiple alleles;