Final answer:
The answer is a. louse & lose. Louse is a parasitic insect, and when you remove the 'U,' it becomes lose, which means to suffer defeat.
Step-by-step explanation:
The answer to the question "A parasitic insect; remove the "U" to find a word meaning "to suffer defeat": a. louse & lose b. tick & trick c. flea & free d. mite & might" is a. louse & lose. A louse is a type of parasitic insect that can infest mammals, including humans. When the letter "U" is removed from the louse, the word lose is formed, which means "to suffer defeat" or "to not win." None of the other options form a word meaning "to suffer defeat" when the "U" is removed.