Which is a type of plankton? a. shark b. squid c. algae d. crab

Algae

Explanation:

Plankton is a general term for aquatic microscopic organisms that lacks the ability to move on their own, hence, they float freely along the water currents. A planktonic organism can either be plant-like known as phytoplankton or animal-like known as zooplankton.

According to the question, algae is an example of phytoplankton that is microscopic and floats freely in water. It is plant-like due to its possession of Chlorophyll. Hence, phytoplanktons are the major producers in an aquatic ecosystem. Other examples in the options are macroscopic motile organisms

feral cats are estimated to eat tens of millions of native animals each night in australia