In a human? Need more context here but should be outside the cell. At equilibrium you will have a more negative environment in the cell.
The mass of a star can be determined by studying D) binary star systems.
Although there may be other ways to determine the mass of a star, this is the most common one which is widely used all over the world when it comes to measuring objects in the universe.
Consumption of food
Breakdown of starch into glucose
Absorption of glucose molecules
Cellular respiration
ATP
I think it’s a hurricane because they are usually on the coast for example Florida
The largest is the Biosphere