My hobby is hiking.
The fresh air from the mountain is very good.
Hiking is hard.
But in the end,
I feel really great.

Sera: Mountain air is very good.
Correct: The fresh air from the mountain is very good.

Sera: But the end for hiking, I feel really great.
Correct: But in the end, I feel really great.

Hello Sera!
Good job on your homework!

You did great. Teacher just made minor corrections.

See you in class!
T. Melody~