Physics is explicitly involved in studying which of these activities?
a.) the mixing of metals to form an alloy
b.) the metabolic functions of a living organism
c.) the motion of a spacecraft under gravitational influence
d.) the depletion of the atmospheric ozone layer due to pollutants
e.) the killing of cancerous cells by radiation therapy

Option (C)

Explanation:

Physics is the study of measurement of different physical quantities.

The motion of a spacecraft under the gravitational influence, is due to the several forces acting on spacecraft.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

e/c, where e is its total energy