Question

brief explanation on why trees shed their leaves in autumn

Answer 1

Answer:

The simple answer is this: Leaves fall off trees so that the trees can survive the winter. ... During that process, the trees lose a lot of water – so much water that when winter arrives, the trees are no longer able to get enough water to replace it.

Explanation:

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Answer 2

It depends on the standard or class you are currently studying in for this question.

But, the exact answer for your question is:

Because the trees' leaves dry out and loose their chlorophyll layer due to necrosis (dying of tissue) and slowly loose their capability to photosynthesize. So, in order to provide the younger parts of the plant or tree, lime the buds or the apixes, the older dying leaves supply out their remaining minerals to the younger leaves and fall out.