Respuesta :
There is many but some main ones are that we breathe oxygen , were warm blooded, we have hair , give live birth and breastfeed
There are several characteristics that classify mammals as mammals, here are the main ones:
Breath air
Vertebral Column
Reproduce live offspring
Have hair or fur
Warm-Blooded
Produce milk
(Others):
Single boned jaw
4 chambered hearts
3 bones in middle ear
1 time tooth replacement (at least) - For example, elephants and manatees have "marching molars".
Diaphragms
