I'm not sure if there were specific answer choices but using complex words actually makes your statement rather unclear, especially assuming they are words the average person wouldn't know or understand.
It means that they have colonized on land
Answer:She died on Feb. 21, 1999, in Chapel Hill, N.C. ( I think you would need a bigger sentence) I think she was a terrific scientist. ( You can't just think. If your not sure then just don't add it or research it more.) Elion also discovered new ways to test drugs. ( Needs longer sentences add comas or something to make it longer!)
That we need to focus on everyone even though its small