Manatees are the closest living relatives of which animal?

A Hippopotamus
B Elephant
C Rhinoceros

Elephants and manatees share a unique connection, both belonging to the order Sirenia. It includes dugongs, Steller’s sea cows and manatees. This order’s closest land-dwelling relatives are believed to be the elephants, part of the order Proboscidea.

The correct answer is Elephant.