On the lesson you would like to edit, select “Add Slide”, then select “Add Activity”. You will see an array of different activities you can include in your lessons. Select add “Poll”.
First write the question you would like to ask your students and the possible answers. You can even add more options!
Keep in mind that in a poll students can select more than one answer and that you will not be able to mark a correct answer. If you'd like to be able to select a correct answer, please create a Quiz. You can learn how to make one here.