I collected some important facts
A homonym is a word that sounds the same but is spelled differently. On the real test you will not be able to read the answer choices. You have to be able to understand which word is which by the context. In this case the homonyms are "fax" and "facts". In the question, "fax" is a verb. In the answer choice it is a noun. You should make a list of all of the homonyms you come across.