pronoun

 

group used after a verb or preposition to refer to a group of people, animals, or things that have already been talked about

I'm looking for my keys - have you seen them?

 

him/her used after a verb or preposition to refer to a person when you want to avoid saying 'him' or 'her' or when you do not know if the person is male or female

When each passenger arrives we ask them to fill in a form.