Question

animals have long and strong legs

Answer 1

Because they need to travel long distances in search of food.And long because to make their speed more faster so that they could catch their prey.

Hope it helped

Answer 2

Answer:

Animals living in the hotter regions have long legs as the longer legs provide the more surface area for radiating off the excess heat produced in their body.

However, the colder climate regions' animals have short legs to conserve the heat produced in the body.

Also,

Their legs are strong as they may have to travel long distances in the search of the food also they need to save themselves from being preyed down by other animals by running away from them which can be done if they have long and strong legs.