The number of bones in a newborn exceeds the number of bones in an adult. Why would the number of bones decrease over time?
A) Some bones are lost when they are replaced by adult versions, like the loss of baby teeth.
B) Some of the bones of babies will eventually fuse together to become one larger bone.
C) As some bones grow larger, others do not and are no longer needed.
D) The bones of a baby are more fragile than an adult, so more are needed to support the weight of the body.
Answer: B
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Fill in the blank(s) with the appropriate word(s).
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