Pronoun Review

1) What is the definition of a pronoun?

2) Please provide an example sentence

3) Find the Pronoun

a) Jack and Jill ran up the hill (He, she, it, they)

b) Jack would like to eat a hamburger (he, she, it, they)

c) Jill will make a strawberry cream pie for dessert  (he, she, it, they)

d) The dinner will be served at 7 pm (he, she, it, they)