The correct answer is (d) Uttarkashi.
Uttarkashi district has the maximum forest area in Uttarakhand, India. As per the Forest Survey of India Report 2021, the forest cover in Uttarkashi district is 72.53%. This is followed by Chamoli district with 69.68% forest cover, Pithoragarh district with 68.82% forest cover, and Dehradun district with 66.86% forest cover.
The high forest cover in Uttarkashi district is due to its mountainous terrain and the presence of several national parks and wildlife sanctuaries. The Nanda Devi Biosphere Reserve, which is located in Uttarkashi district, is one of the largest protected areas in India. The reserve is home to a variety of wildlife, including snow leopards, Himalayan tahr, and musk deer.
The forest cover in Uttarkashi district plays an important role in the local economy. The forests provide a source of livelihood for many people in the district, who are engaged in activities such as agriculture, livestock rearing, and forest-based industries. The forests also help to regulate the climate and provide a habitat for a variety of plants and animals.