Which of these is a heterotroph
-plant -producer -consumer -phytoplankton

Consumer

Explanation:

Heterotrophs rely on other organisms for food, so they are consumers.

Hope this helps! :)

C.consumer on Edge 2021

Explanation:

In ecology, an organism that obtains nutrients by consuming other organisms is called a heterotroph. Unlike autotrophs—organisms that can synthesize their own nutrients from inorganic substances—heterotrophs cannot produce their own food.

the index of refraction of the second medium is higher. i just took the test trust me !