Which of the following is not considered an action verb in a letter of application?

In the context of a letter of application, action verbs are words that convey specific actions or accomplishments, showcasing the applicant's skills and contributions. Words like "develop," "contribute," and "manage" all represent proactive actions that candidates might have undertaken in their professional experiences, making them impactful when communication with potential employers.

The word "cheerfully," however, is an adverb that describes the manner in which an action is performed rather than indicating any action itself. It can modify actions but does not convey a specific action that the applicant has taken or can take. Therefore, it does not fit the definition of an action verb within the context of a job application, which is why it is the correct choice in identifying which term does not belong among the given options.