Sarah shot this photograph for her travel blog. Which technique did Sarah use to create depth in this photograph?

Depth of field. It can’t be contrast because there is nothing different between the two sides. They are mirror images that are powerful because of the vast mass of trees.
Answer:
Hello! Its "Linear Perspective". You can't see it on the photo but it's one of the answers given.
Explanation:
1. A Linear perspective is like an illusion of depth on a flat surface. The parallel lines in a painting, drawing, or photo used in this are a single vanishing point on the composition's horizon line. In other words, it's an illusion that makes you think both sides are perfectly a-lined and it looks cool.
2. So if you look up "Linear Perspective" and go to "images" there are literally photos that match this one.
3. I took the test and got 100% lol.
4. To the other person who answered, you did yah best :D.
In all, I hope you get 100! You got this and stay safe!