Question

question 1
why does the adult vertebral column have fewer vertebrae than that of a newborn?
answer
as the skull enlarges after birth, some cervical vertebrae are destroyed.
vertebrae are resorbed as bones are remodeled.
some vertebrae fuse together after birth.
lumbar vertebrae are joined together to provide more support.
i dont know yet

Explanation:

During development after birth, some of the individual vertebrae in the vertebral column of a newborn fuse together. This process leads to a reduction in the total number of separate vertebrae in the adult vertebral column compared to that of a newborn.

Answer:

Some vertebrae fuse together after birth.