DNA replication is an important part of cellular division because correct replication-

Replicating DNA is fragile, and can break during the duplication process. In fact, broken chromosomes are often the source of DNA rearrangements and can change the genetic program of a cell. These changes can trigger a growth advantage in a single cell in your body, and when that cell continues to divide, tumors arise. Fortunately, our cells have defense mechanisms to shield us from these damaging events.

because the light is a great source of energy for the plants to survive. (i hope this )

human-caused climate hope this