Yes, by the appearance of a mammal, you can determine its habitat on Earth. Due to their physical properties, they have mastered almost all habitats. Here are some examples:
A) The dolphin is a mammal and lives in the seas and the ocean, this is evidenced by its body shape and limbs in the form of a tail;
B) Moles are also mammals and live in a soil environment, their limbs are adapted for digging tunnels.
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