Answer:
Theresa can swim very fast. (Theresa puede nadar muy rápido.)
Explanation:
Thanksgiving is a day everyone gives thanks for when the native Indians helped the Europeans. Labor Day is being grateful for our American soldiers.
Something like that.
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.