In which case is the verb form 'been' correctly used?

The verb form 'been' is correctly used in the phrase "He has been waiting for hours." In this case, 'been' is part of the present perfect continuous tense, which consists of the auxiliary verb 'has' (or 'have') plus the past participle 'been' followed by the present participle of the main verb ('waiting' in this case). This construction is used to express an action that started in the past and continues into the present or has relevance to the present.

In the other examples, the usage of 'been' is incorrect because they lack the necessary auxiliary verbs or do not follow the correct grammatical structure for their intended meanings. In contrast, the first choice demonstrates a clear and proper use of 'been' to indicate an ongoing action.