Sunlight is the main energy source
The answer is cellular aging theory. This theory focuses on the ways then that the molecules as well as the cells are being affected by aging and the passage of time. Aside from this theory there are 2 more theories of aging namely the genetic theory and the wear and tear.
Is it a question or ... no ?
The answer is C. It is naturally occurring
Answer:
Gray (or Grey) Matter-the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.
White Matter-he paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.
Explanation:
