Write three features of mammlia.​

Mammals are a class of endothermic vertebrates. Mammals have four limbs and produce amniotic eggs. Other traits of mammals include sweat glands in their skin, alveoli in their lungs, a four-chambered heart, and a brain covering called the neocortex.

All mammalian has a bone structure that consists of a skull with a brain inside and a spine with a spinal cord inside.

All mammalians have three little bones into the middle ear to transmit sound.

Explanation:

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