Final answer:
A person who channels aggressive impulses by becoming a soldier exemplifies the defense mechanism called Sublimation, which is viewed as a mature way to transform unacceptable urges into acceptable behaviors.
Step-by-step explanation:
A person with strong feelings of aggression who becomes a soldier is an example of the defense mechanism known as Sublimation. This mechanism allows individuals to channel unacceptable impulses, thoughts, or emotions into more acceptable or constructive activities. It is considered one of the more mature defense mechanisms and is often seen positively. For example, someone with aggressive tendencies might take up a sport or join the military where the aggression can be expressed in an acceptable and structured environment.
Among Freud's defense mechanisms, reaction formation involves expressing the opposite of one's true feelings, while regression entails reverting to behaviors from an earlier stage of development. Projection involves attributing one's unacceptable desires or thoughts onto another person. As understood by Freud, using defense mechanisms like sublimation helps to manage the anxiety produced by conflicting feelings and desires.