When polynesia was settled, became a key to survival because each island had different resources.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

the boundarys like convergent divergent and transform it causes subduction