The rotation of the Earth in its axis
I agreed with him for 100%
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth.
I hope that’s help:)
Concentration gradient across the membrane. Proteins in the membrane allow specific molecules through, passively.