Shannon hears a strange rustling noise on her nature walk and then sees a black bear in the clearing. She feels terror but escapes without injury. Now when she walks in the woods, when she hears a rustling noise she instantly feels fear. This BEST illustrates:

Classical conditioning.

Explanation:

Classical conditioning is defined as process in which association or link between potent stimulus and earlier unbiased stimulus is established for generation of learned response. This mechanism induces involuntary responses in humans or animals.

According to the question, Shannon's behavior of getting scared if she hears rustling sound from woods while walking because of her past interaction with bear while nature walk.This induces a learned response through link of rustling sound with fear through classical conditioning.

answer; /// the above statement is (true);