Answer: A) Biography.
Step-by-step explanation: A root word it's the most basic part of a word (without prefixes or suffixes). From the given options, the word that correctly fills in the blank, is the corresponding to option A: biography. The word "biography" is formed by two root words, the first one is "bio" which means "life" and the second one is "graph" which means 'to write, based on the meaning of "graph" this is the correct answer to the question.