The correct option is River Suyal.
Explanation
The rock shelters at Lakhudiyar are significant remnants of prehistoric art in the Himalayan region. The name 'Lakhudiyar' literally translates to "one lakh caves." These shelters preserve paintings from the Stone Age, depicting the life and environment of early humans.
Detailed Analysis:
- Geographical Location: The Lakhudiyar caves are situated in the Almora district of Uttarakhand. Specifically, they are located on the banks of the River Suyal.
- Artistic Features: The paintings found here are divided into three categories: humans, animals, and geometric patterns. They utilize colors such as white, black, and red ochre.
- Incorrect Options: River Alaknanda flows through Uttarakhand but is not associated with this specific prehistoric site. Rivers Betwa and Narmada are primarily located in Central India (Madhya Pradesh), where other rock art sites like Bhimbetka are found.
Key Takeaway: Lakhudiyar is a premier prehistoric rock art site located on the banks of the River Suyal in the Almora district of Uttarakhand.