Answer:

comb jelly

Earth's first animal was the ocean-drifting comb jelly, not the simple sponge, according to a new find that has shocked scientists who didn't imagine the earliest critter could be so complex. The mystery of the first animal denizen of the planet can only be inferred from fossils and by studying related animals today

Explanation:

Answer:

A. Comb jelly

Explanation:

hope it helps