Answer:
Conversion of energy
Explanation:
Shaking the sand is a form of kinetic energy. The friction of the sand particles rubbing against each other converts the kinetic energy to heat energy. Some of the kinetic energy also converts into the energy of sound waves, which you can hear while you shake the sand.
C. Look at a small sample I think
Humans have impacted wwell almost everything including the technology well the biome includes them because of there radiation power and the next que is confusing. sorry