Is walls have ears a metaphor?

yes

Palestinian and Persian

It means that someone is listening in on your conversation, and you don't want them to hear what you're saying. Example: If you and your friend are talking about a surprise party your throughing for...

Identify the metaphor of Bella's words of encouragement were music to my ears

your ear hears sounds through a wall because of basic physics. when a noise is made, the air particles move. the particles then transfer the engery they received onto another particle. this process...