What does she do?
She is an artist./An artist
What does she do?
She is a singer/A singer
What is this?
It is (the) water puppet show/(the) water puppet show
What are these?
They are musical instruments/They're musical instruments/musical instruments
What is he doing?
He is painting/He's painting.
What is the name of this room?
(An) art gallery
What is this?
It's a paintbrush/It is a paintbrush/A paintbrush
What is this?
It is a camera/It's a camera/a camera