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:
conservation -prevention of wasteful use of a resource. All of these are preserving the earth from ruining the atmosphere! Its A.
Explanation:
This refers to the Enclosure movement which was prominent in
Britain from the 18th century to the 19th century. Enclosure
means to divide or consolidate the communal lands and small holding into what
we now see as one big farm which was owned by an individual. This meant that the
villagers could no longer, as they could before that, use that land to raise
livestock among other things.
Biological warfare (mustard gas)