Question

name the first animal came in on earth​

Answer 1

For some four billion years, no life existed on Earth more complex than a simple cell.

about 575 million years ago multicellular life forms suddenly began to multiply.

scientists don’t know with certainty if many of those creatures were animals, fungi, algae, lichens or simple protozoa

Answer 2

Answer:

The red algae called Bangiomorpha, dated at 1.2 Ga, is the earliest known organism that certainly has differentiated, specialized cells, and is also the oldest known sexually reproducing organism. The 1.43 billion-year-old fossils interpreted as fungi appear to have been multicellular with differentiated cells.