Question

Of what use are their legs to frog, duck and tortoise

Answer 1

Explanation:

According to me a duck has webbed feet that helps it to both walk on land and swim in water by pushing water back.A frog's feet help it to jump on land.The structure of a frog's feet make it jump but a frog cannot walk.Though it can easily swim in the water.Similarly a tortoise has a huge body but small feet.The upper crust of a tortoise's body is very hard.It acts as a shield to its body.A tortoise's feet help it in both walking on land and swimming in water.

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Answer 2

frog : for hopping...
duck : to walk on land,to swim...
tortoise : to walk on land,and in water to swim...