Why does the head develop more rapidly than the rest of the body during the embryonic stage?
A. The head is required to provide structural support to the rest of the body.
B. The brain is essential for the development of the rest of the body.
C. Growth hormones are first secreted from the limb buds towards the head.
D. During embryogenesis, the torso and limb buds fold out from under the head.
Answer: B
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