Answer:
population density is the answer of the question
Using kilometers in space is useless, as the distances between objects is drastically incred. A lightyear is 9.5 kilometers. It is simpler to say "Alpha Centauri is 4.1 light years away" than it is to say "Alpha Centauri is 28.95 Trillion kilometers away"<span />
<span> Animal cells will swell when they are placed in a hypotonic solution</span>
The answer is the 1st statement.
