A) When contracted a muscle becomes shorter, stiffer and thicker.
B) A contracted muscle pushes the bone.
C) The fins of tail help the fish to keep its body balance.
D) The snakes move very fast in a straight line.
Correct Answer: A
Solution :
A contracted muscle pulls (not pushes) the bone. The fins of tail help the fish in its body movement (not in body balance). The snakes move very fast and not in straight line.
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