1. My favorite photo is the one of the man climbing for on top of the mountain. He is wearing red and is carrying a climbing pack.

2. No, They look like they have been taken by a personal photographer and not a normal person on a hike or a trail.

3. The apps just put a filter on the photo adding an effect on the picture.

4. I think that if I balanced my subjects and framed then it would the photo would look more professional.