The cellular process diffusion does not require cellular blank to reach equilibrium. Similarly blank uses a selectively permeable membrane to reach equilibrium

The fill in the blanks are -

Passive transport is the movement of substances from their high concentration area to low concentration area.  

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The cellular process of diffusion does not require cellular energy to reach equilibrium.

Osmosis uses a selectively permeable membrane to reach equilibrium.

Explanation:

The process of diffusion in which energy is not required is called passive transport.

Osmosis is also a type of diffusion in which materials pass through a semi-permeable membrane in the cell. Semi-permeable membrane allows certain solutes to pass through such as salts and nutrients etc.