An action verb is a word that conveys a specific action performed by a subject, whether it's a physical movement or a mental process. These verbs give life and momentum to sentences by clearly indicating what someone or something is doing. For instance, verbs like “create,” “observe,” or “organize” describe tasks or behaviors that show initiative or thought. When used effectively, action verbs make writing more vivid and purposeful. In the sentence “Students analyze data for the experiment,” the word “analyze” is the action verb, showing a mental activity that drives the sentence's meaning.