One of the following exist as colony

Volvox is a type of colony. A colony is a group of organisms that live together and work as a unit, like a tiny community. In the case of Volvox, it's a colony of green algae that live and move together in a spherical shape. Each individual alga is called a cell, and the cells work together to form a larger structure that can move as a whole. This helps the colony to survive and thrive in its environment.