Animal Behavior College (ABC) Externship Practice Test

The prefix aur(o) signals the ear, coming from the Latin word for ear, auris. In medical terminology, this root shows up in words like auricle (the external part of the ear) or auricular (relating to the ear). That’s why it’s the best answer here: the term specifically ties to the ear. The other ideas don’t fit because listening relates to audi- or audio-, self uses auto-, and under the arm involves terms like axillary, not aur(o).