Alex and Marissa were observing a dog digging a hole in the ground. They tried to draw conclusions about which of Earth's five spheres were interacting. Alex argued that since the dog was digging in the ground, only two spheres were interacting.

Marissa argued that three spheres were interacting in this situation.

Determine who you agree with and explain why. Be sure to list the spheres and explain how they are interacting in the scenario.