Question

Which of the following best describes the process of diffusion?

Answer 1

Answer:

Option (4).

Explanation:

Diffusion is the important process by which solute particles move along the concentration gradient. The diffusion process is useful in exchange of ions and other particles in the cell.

The solute particles move from region of higher concentration of solute  to the region of lower concentration of solute. No input of energy is required in this process.

Thus, the correct answer is option (4).

Answer 2

"Diffusion is the movement of molecules from an area of higher concentration to one of lower" is the one among the following choices given in the question that best describes the process of diffusion. The correct option among all the options that are given in the question is the fourth option or the last option.