A surfactant (reduces/increases) the surface tension of water and tends to (promote/inhibit) emulsification.

Surfactants reduces surface tension of water and promotes emulsification.

Explanation:

Surfactant is generally an organic molecule or compound that is amphiphilic in nature. Surfactants can act perform as emulsifiers, detergents, foaming agents, dispersants and wetting agents.

Surfactants decreases the surface tension between the solid and liquid, gas and liquid and two liquids and can acts as emulsifying agents, cleaning agents, dispersing agents, foaming and anti-foaming agents.