Question

Which organism is at the bottom of an ocean food chain?

A. plankton

B. shellfish

C. sharks

D. clams

Answer 1

i think it would be A. Plankton.

Answer 2

Answer: A. plankton

Explanation: The bottom level of the ocean's food chain is made up of one-celled organisms called phytoplankton. These tiny organisms are microscopic.