Pretty sure the answer is B. Hunting, as this will dwindle the population of elk.
Matter in the plasma state have a variable volume and shape. Plasma contains ions and electrons , both of which can move around freely.
The answer is d, since air is a muxture of compounds. a way to differentiate between a muxture and a compound is to see it it is a word you would say normally. for example, you would say air on a normal day. however, you wouldn't say carbon monoxide on a normal day.
hope it helped! :)
Color change, gas released, volume change, temp change
