Answer:
Rex Salazar is a 16-year-old, amnesiac EVO with the ability to grow weapons and machines out of his body at will. ... Unintentionally, Rex disappeared six months into the future and returned to Providence with a new regime he disapproved of.
Explanation:
To emphasize his determination
You can look at the words in front and behind it, because they refer to this big word. You may find a synonym of the word or a close reference. So for example in this sentence: I was excited and ambitious to learn about cars today. So this is a easy example. You can use exited to define ambitious if you dont know what ambitious means.