A Choice activity allows you to present a single question to students with multiple responses as possible answers. Each student can then pick one of the given choices.
This activity can be useful as a quick survey of your class, for example to poll for student votes on which readings they want to discuss further in class. It can also be used as a "sign up sheet" by limiting the number of responses allowed per option.
To survey your students with multiple questions, use the Moodle Questionnaire activity (see Add a Questionnaire Activity in Moodle.)