What is
the role of DNA polymerase in this process?

In what process, all I know is that it’s an enzyme that translates DNA molecules from deoxyribonucleotides. And it also plus an important role in DNA replication

c. are smaller than lakes. Ponds and lakes are often indistinguishable, and rules in classifying may differ per region. But ponds are relatively smaller than lakes and more shallow. Lakes are deep  enough that light cannot penetrate the bottom of the water.