Prefixes are added to the front of a word to change or modify its meaning. For example, if we add the prefix -il to literate, we would get its antonym (the word that has the opposite meaning) illiterate.
We would add an <em>infix </em>in the middle of a word.
We would add a <em>suffix </em>to the end of a word.
A. “Alex went to their kitchen in HER house” is WRONG
SOMEONE WHO INSPIRES FEARRRR
I believe your best answer would be terrace