Q: What is the main component of phytoplankton?


Read this paragraph and choose the correct option from the provided answers:

Algae play significant roles as producers in aquatic ecosystems. Microscopic forms live suspended in the water column. They are the main component of phytoplankton. As such, they contribute to the food base of most marine ecosystems.

 Choices:

- amoebas

- seawater

- cells

- algae


A:
algae