Which statement about locomotion is true?
A) Locomotion requires energy to overcome friction and gravity.
B) Gravity is a greater locomotion problem for animals in water than for those on land.
C) Overcoming friction is a greater locomotion problem for land animals than for those that live in water.
D) Bone strength is more important than body shape in the locomotion of land animals.
Answer: A
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Fill in the blank with the appropriate word.
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