Clenching the fingers to make a fist, then relaxing and straightening them is an example of :Flexion followed by extension
To put it simply, joint will become shorter during flexion and will become longer during extension. When he made a fist, he curled ul the joints in his hand, and when straightening the arm, he elongate the joint on his elbow
Answer:
A
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Explanation:
D) It modernized farms and rural areas
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Answer:
material that current can pass through easily
C) everpation and transportation