The Manasa Puja is associated with the worship of the snake goddess and features the creation of:

Elaborate masks
Ritualistic paintings
Clay idols
Flower arrangements

The correct answer is: c) Clay idols.

Manasa Puja is a Hindu festival dedicated to the snake goddess Manasa. It is celebrated in the month of Shravana (August–September) in the Indian subcontinent. The festival is observed by Hindus to seek the blessings of Manasa to protect them from snake bites and other snake-related problems.

One of the main features of Manasa Puja is the creation of clay idols of Manasa. These idols are usually made by potters and are decorated with flowers, fruits, and other offerings. The idols are then worshipped by Hindus during the festival.

Other features of Manasa Puja include the recitation of Manasa Mantras, the offering of prayers to Manasa, and the distribution of food and other offerings to the poor.

Elaborate masks, ritualistic paintings, and flower arrangements are not associated with Manasa Puja.