The Ecosphere basically contains plants (algae), animals (shrimp), and bacteria. How is this system self-sustaining? Talk about photosynthesis and cellular respiration.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on

It is maybe photosnyethsis

Ai believe is the correct answer