Question

fix any words that are used incorrectly. when tessa finally reached the summit of the mountain, she felt great, beside being a little out of breathe.

Explanation:

1. "beside" is incorrect here; the correct preposition meaning "in addition to" is "besides".
2. "breathe" is a verb, but the phrase requires the noun form "breath" (the correct idiom is "out of breath").

Answer:

When Tessa finally reached the summit of the mountain, she felt great, besides being a little out of breath.