Effleurage is used in massage primarily for its:

Effleurage is a technique in massage characterized by long, sweeping strokes that are typically performed with the palms of the hands. This method is primarily used to create a soothing and relaxing experience for the client. The gentle pressure and rhythmic nature of effleurage strokes help to calm the nervous system, reduce muscle tension, and promote an overall sense of wellbeing, making it particularly effective in contributing to relaxation.

The other options, while they have their own benefits, do not capture the primary purpose of effleurage. Invigorating effects are more associated with techniques that stimulate the body, rather than calm it. Although effleurage can have therapeutic benefits and contribute to pain relief, those aspects are usually secondary to its primary function of fostering relaxation.