For this discussion question, you will need to post something that a missing comma changes the meaning of and explain how it changes the meaning of the statement. An example response might be (and you can't use this one): You need to have a comma in the sentence, "let's eat, Grandpa." You have to have the comma because if you write, "let's eat Grandpa," then you are suggesting that you are going to eat your grandfather instead of letting your grandpa know that dinner is ready and that it's time to eat.