What part of the leaf absorb the sunlight?

If you want to know about the leaves that are still attached on trees and what they absorb, here:

As the sunlights rays hit the leaves,they abosorb as much as they can.When they do this,they send the energy particle they've absoorbed down through the trunk and into the roots.Here the roots use the rays to create food or energy for growth.They do this by using photosynthesis.