Нужно составить вопросы.

The telephone and the telegraph are means of communication

1. Are the telephone and the telegraph means of communication? (общий вопрос)

2. What are the means of communication? (вопрос к подлежащему)

3. The telephone and the telegraph are means of communication, aren't they? (альтернатиный вопрос)

4. What kind of means are the telephone and the telehraph? (специальный вопрос)