Addiction is most likely the answer.
Osmosis is the process by which molecules of a solvent pass through a semi-permeable membrane from a less concentration to a higher concentration.
Diffusion is the passive movement of molecules from a higher concentration regions to a region of lower concentration.
Active transport is the movement of molecules against a concentration gradient.
Bulk transport is the movement of macromolecules into or out of the cell
Mass and Distance. If the moon had a larger mass or was farther then it would fall out of Earths orbit. Same for Earth. The mass and distance affect where the planet falls into orbit
