Which of the following changes in deciduous forests occurs in the spring?
a.
trees regain their leaves.
b.
trees block the flow of water and nutrients to their leaves.
c.
the leaves of trees begin to lose their chlorophyll.
d.
trees live off of stored nutrients.

The answer is A. The deciduous trees start to regrown their leaves in preparation for summer, that follows spring, a season with plenty of sunlight hence the plant will be able to photosynthesize. The losing of leaves during autumn and winter is a survival strategy against harsh weather of winter or to conserve water in drought.  

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .