Two on bottom are erosion and the top left one. the other two on top are weathering
File is attached for the Answer
By the process of absorption.
Explanation:
Molecules move away by absorption of light. This causes a molecule to rearrange its structure in such a way that atoms are lost and it becomes another chemical species. One biologically important photorearrangement reaction is the conversion of 7-dehydrocholesterol to vitamin D in the skin.
Hope it helps you...
<em>Benjemin</em>
