Which one of the following aspects is an exclusive characteristic of living things? (A) Isolated metabolic reactions occur in vitro. (B) Increase in mass from inside only. (C) Perception of events happening in the environment and their memory. (D) Increase in mass by accumulation of material both on surface as well as internally

Option C Precipitation of events happening in the environment and their memory.

Explanation:

This phenomenon is called as consciousness or irritability. Increase in mass could be seen in nonliving things as well such as in the crystal.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves