Explanations:The Singalila Range is a significant geographical feature that separates Sikkim from Nepal in the western part of Sikkim. This range is part of the larger Himalayan mountain system and is known for its natural beauty and trekking opportunities. The Singalila Range is a natural boundary that helps define the political and geographical limits between Sikkim and Nepal.
Mountain ranges often serve as natural boundaries between countries and states, providing a clear and visible demarcation. In the case of Sikkim and Nepal, the Singalila Range plays this role. The range is characterized by its high peaks, dense forests, and diverse flora and fauna, making it a significant ecological and geographical feature.
It is important to understand the geographical layout of regions, especially when studying the boundaries between states and countries. The Singalila Range is a prime example of how natural features can define political boundaries. This range not only serves as a physical boundary but also as a cultural and ecological boundary, influencing the lives of people on both sides.
Other mountain ranges in the region, such as the Dongkya Range, are located in different parts of Sikkim and do not form the western boundary with Nepal. Therefore, the Singalila Range is the correct answer to the question of which range separates Sikkim from Nepal in the west.