Diagram A: Passive transport
Diagram B: Equilibrium
Diagram C: Active transport
Diagram D: Equilibrium
Diagram E: Active transport
Diagram F: Passive transport
Passive transport: The molecules go through the membrane from a place of higher concentration to a place of lower concentration according to the second law of thermodynamics, without the need to consume energy, until the system reaches the equilibrium.
Active transport: The molecules go through the membrane against the concentration gradient, with an energy cost to the cell.
Equilibrium: It is not static but dynamic, so some molecules may go through the membrane in both directions, but the result will be the same concentration in both sides of it.