This is the definition of what word: the random movement of molecules across a concentration gradient until the difference in concentration between two regions is near zero? diffusion osmosis passive transport active transport

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which label correctly identifies what x represents in the concept map?