A1
used as the subject of the verb when referring to a group of people, animals, or things that have already been talked about
Dictionary examples:
The dogs are happy. They got treats. (0.0)
Books are smart. They know many things. (0.0)
Clouds are silly. They make funny shapes. (0.0)
I've known the Browns for years. They're very nice people. (12.0)
Where are my glasses? They were on the table just now. (15.3)