Which scenario describes an interaction between two of Earth's spheres? Water flows from a stream to a lake, gravity moves rocks to another location, Lions use energy to catch other animals for food or bears dig big holes in the ground to protect their young.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

the first question's answer is a.