Explanation: The Andaman and Nicobar Islands are a group of islands located in the Bay of Bengal, forming a union territory of India. This union territory is renowned for its stunning beaches and rich biodiversity, making it a significant tourist destination. The islands are known for their pristine and picturesque beaches, which are a major draw for tourists. Some of the popular beaches include Radhanagar Beach, Corbyn's Cove, and Elephant Beach, which are known for their clear waters, white sand, and natural beauty.
The Andaman and Nicobar Islands are not only famous for their beaches but also for their diverse flora and fauna. The islands are home to a variety of endemic species, including the Andaman Teak and the Nicobar Pigeon. The rich marine life around the islands, including coral reefs and a variety of marine species, also attracts divers and nature enthusiasts.
Tourism in the Andaman and Nicobar Islands is a significant part of the local economy. The government has developed various facilities and infrastructure to support tourism, including hotels, resorts, and recreational activities. The islands offer a range of activities such as scuba diving, snorkeling, and island hopping, which contribute to their popularity as a tourist destination.
In contrast, the other options listed do not fit the criteria of being known primarily for beaches and tourism. Delhi, the capital city of India, is known for its historical monuments and cultural heritage. Puducherry, another union territory, is known for its French colonial architecture and some beaches, but it is not as renowned for tourism as the Andaman and Nicobar Islands. Chandigarh, a union territory known for its modern architecture and planned city layout, is not primarily known for beaches and tourism.
Therefore, the Andaman and Nicobar Islands are the correct answer as they are the union territory known for its beaches and tourism.