Some people say love makes the world go around. Others say it is
not love:it s money. Since the truth is that it is energy that makes the                【A1】________
world go around. Energy is the currency of the ecological system and
life becomes possible even when food is converted into energy; which              【A2】________
in turn is used to seek more food to grow, to reproduce and to survive.
In this cycle all life depends. Itis fairly well known that wild animals                    【A3】________
survive from year to year by eating as many as they can during times                 【A4】________
of plenty, the summer and fall, stoning the excess, usually in the form
of fat, and then using these reserves of fat to survive during the hard
time in winter when food is scarce. But it is probably less well known                 【A5】________
that even with their stored fat, wild animals spend less energy to live in
winter than in summer A good case in point is white-tailed deer. Like                【A6】________
most wildlife, deer reproduce, grow; and store fat in the summer and
fall when there is plenty of nutritious food available. A physically
mature female deer in the good condition who has conceived in                       【A7】________
November and was given birth to two fawns during the end of May                  【A8】________
and first part of June, must search for food for the necessary energy not
only to meet her body 's needs but also to reproduce milk for her fawns.          【A9】________
The best milk production occurs at the same time that new plant
growth is available. This is good timing. because milk production is an
energy consuming process——it requires a lot of food. The Cost can be           【A10】________
met unless the region has ample food resources.

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【A10】