EXAMPLE:

Sarah: What's this, Sam?
Sam: It’s a bicycle.

SARAH: What's this, Sam?

SAM: It's a bicycle.

SARAH: And what’s this?

SAM: It’s a house.

SARAH: What's this? A bus?

SAM: Yes. 

SARAH: And what's this? A horse?

SAM: No, Sarah. It’s a mouse!