Biodiversity is important to maintain stability in an ecosystem. in order to maintain species numbers over time, which two processes must be equivalent?

a) speciation and extinction
b) mutation and crossing over
eliminate
c) emigration and immigration
d) sexual and asexual reproduction

i am positive it is c. condensing but i may be wrong

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above