I would say when he stated he was excited let us know he was happy and ready pumped hope i helped :)
I guess it is a source name. If I'm wrong, sorry
Answer:
Yes
Explanation:
Because then you could talk to the head principal with your parents and get direct help if needed.
So we dont have to keep saying the persons name over and over again
Example without pronouns : Alex had a great time, alex also likes going outside, then alex did his homework.
Example with pronouns : Alex ahd a great time, he also likes going outside, then he did his homeowrk.