Final answer:
In Greek, a verb's stem contains the base of the verb (e.g., graph = write), and the various verb suffixes, referred to as personal endings, indicate tense and person. Therefore, the correct answer to the student's question is: A) Base, personal endings, tense, mood.
Step-by-step explanation:
Greek verbs are classified into different conjugations based on their stem vowels and patterns. The specific rules for conjugating verbs depend on the verb's characteristics and the conjugation group to which it belongs.
Learning Greek verbs involves understanding these various aspects and practicing their conjugation patterns in different tenses and moods. As with any language, mastering Greek verbs is crucial for constructing grammatically correct and meaningful sentences.