Question

because of cataracts, a neighbor was deprived of visual experiences during early childhood. last year, her vision was restored by surgery, but she is having difficulty in dealing with the visual world. this is probably because: visual deprivation has no effect on brain development. brain development ends in childhood. normal pruning of the visual brain cells occurred. brain cells normally devoted to vision died or were diverted to other uses.

Explanation:

Early - childhood is a critical period for brain development related to vision. When there is visual deprivation during this time, brain cells associated with vision may not develop properly. They could die or be repurposed for other functions. Visual deprivation does affect brain development, brain development doesn't end in childhood, and abnormal rather than normal pruning would occur due to deprivation.

Answer:

D. brain cells normally devoted to vision died or were diverted to other uses.