Being timed ya girl out ! select the word from the list that best fits the definition supports the theory that the universe is expanding

answer choices;
parallax
light-year
main sequence
h-r diagram
red shift
fusion
elliptical galaxy
barred spiral galaxy
irregular galaxy
milky way galaxy

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water