1. what is microbial growth?

Microbial growth requires a minimum in addition to pH, temperature, and other appropriate conditions that are important for the growth of bacteria, molds, and yeasts.

Bacterial growth is the asexual reproduction, or cell division, of a bacterium into two daughter cells, in a process called binary fission. Providing no mutational event occurs, the resulting daughter cells are genetically identical to the original cell.

A. Gravity

Explanation:

The strong gravity, or "Pull" of the Earth is what keeps the moon in orbit.

I hope this helps!