________ help the earthworm to get a grip on the ground.
A
Bones
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B
Bristles
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C
Skin
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D
Muscles
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Solution
The correct option is B Bristles Earthworms have a large number of tiny bristles (hair-like structures) projecting out. The bristles are connected with muscles. They move by repeated expansion and contraction of the muscles. The bristles help the earthworms to get a good grip on the ground.