You are in CloudShell, a small Linux machine inside the account with the aws command already set up. Ask it about the world it lives in:

aws ec2 describe-regions --output table

--output table asks for a table instead of the raw answer; lesson 4 covers the output options. Each row is one region. Now the zones inside the region CloudShell is sitting in:

aws ec2 describe-availability-zones --output table

Answer the questions from what you see.