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For those who don't know about the festival:

"Nava" means nine, and "Ratri" means night. Navaratri is a Hindu festival that spans nine nights (and ten days) and is celebrated every year in the autumn. On the final day, called the Vijayadashami or Dussehra, the statues are either immersed in a water body such as river and ocean or the statue symbolizing the evil is burnt with fireworks marking evil's destruction. The festival also starts the preparation for one of the most important and widely celebrated holidays, Diwali, the festival of lights. 

The top-left image is of the goddess Durga who battled and emerged victorious over the buffalo demon to help restore Dharma or justice. The picture beside it is of women wearing Garba outfits. "Garba" is a dance form from Gujarat, a state in western India. 

The image with the brown background is a rangoli, an art form in which patterns are created on the floor or the ground using materials such as colored rice, dry flour, colored sand, or flower petals. The picture beside it is a puja thali/plate, a tray or large container on which the entire puja materials are accumulated and decorated. "Puja" is a worship ritual performed in the morning by Hindus to offer devotional homage and prayer to one or more deities, to host and honor a guest, or to celebrate an event spiritually.

The picture below the puja thali is the Golden Temple (or the Golden Temple of Mahalakshmi) in Sripuram, Tamil Nadu (a state in southern India). It's a Hindu temple covered with pure gold. The image beside it is a pair of dancers doing Dandiya (or Dandiya Raas). It is a socio-religious folk dance originating from the state of Gujarat and popularly performed in this festival. "Dandi" means stick, and people get arranged in pairs, and dance together. Every person gets two sticks.

(Information obtained from Wikipedia.)