Sweating and panting are examples of which characteristic of life?
responding to the environment
using energy
reproducing
growing and developing.

The answer is using energy.

When one is sweating or panting, they are usually found doing some form of physical activity-or doing something social, but that is not the point. When doing physical activity, it requires energy and protein, so it's safe to say that when someone is sweating or panting, they have been or are doing something that is using up their energy.

I hope this helps.

answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.

did you ever figure it out?