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Question

Humans are able to walk and hold objects in hands because of _______.

A
gravitational force
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B
magnetic force
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C
mechanical force
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D
frictional force
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Solution

The correct option is D frictional force
The frictional force allows us to walk on a surface and hold objects in our hands. If there would have been no friction, the objects would have slipped out of our hands and our feet would have slipped on the surface, making it difficult to walk.

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