I do believe that it is C. crossing over :) I hope that is correct, it seems like the only plausible answer.
Answer:
Leaves are the site of the food making process called photosynthesis. In this process, carbon dioxide and water in the presence of chlorophyll (the green pigment) and light energy are changed into glucose which is sugar. This energy rich sugar is the source of food used by most plants.
Explanation:
The cerebral area posterior to the central sulcus is the frontal lobe .
