How to prove that it is a water reflection in the video?

In the video, we can observe the morphological evidence of the reflection, observe the color of the reflection, and observe the position of the reflection to prove the reflection of water. Details are as follows:

1. Observe the form of reflection: the reflection of water is wavy, while the reflection of other objects usually presents a smooth curve or angle.

2. Observe the color of reflection: the reflection of water appears blue-green or blue, while the reflection color of other objects changes according to the color of the surface of the object. The reflection of water can be proved by observing the color of the reflection.

3. Observe the position of reflection: the reflection of water appears above the water surface, at the same angle as the water surface. The reflection of water can be proved by observing the position of reflection.