Answer:
Randy's class is studying world history, is a present participle.
Explanation:
In English, present participle is a kind of verb which usually ends in 'ing.' For example: She is thinking. Here, 'thinking' is a verb form and a present participle. Similarly crying, laughing, playing, doing are all examples of present participle. The sentence, 'Randy's class is studying world history' is a present tense where the verb 'studying' acts as a present participle.
