Question

what is true about an endosymbiont? they are very big cells. they eat other cells. they live inside the cells.

Explanation:

Endosymbionts are organisms that live inside the cells of another organism. They have a symbiotic relationship where they reside within the host cell. The option "They live inside the cells" is correct as it directly aligns with the definition of endosymbionts. The other options are incorrect: endosymbionts are not necessarily very big cells (size is not a defining characteristic) and they do not eat other cells (that would be a different biological process like phagocytosis).

Answer:

They live inside the cells.