Which of the following facts supports the argument that a pregnant cow should be fed more in its last trimester? The placenta is formed by the end of the first trimester
The heart beats and organs are formed during the first trimester.
Teeth and fur develop during the second trimester.
Three-quarters of all growth occurs during the third trimester.

Three-Quarters of all growth occurs during the third trimester.

Explanation:

D is the only option that has anything to do with the last trimester which is what the question was asking about. Furthermore, because so much growth is occurring during this time the cow will need more food to support this growth. So, D is the best option.

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b a mature ovary of a plant.