The correct answer is option 1: Nilgiris. The Nilgiris is a mountain range located in the western part of Tamil Nadu and the southeastern part of Kerala in South India. It is one of the oldest mountain ranges in India. The Nilgiris are known for their unique and diverse ecosystem, which includes temperate forests called `Sholas`.

Sholas are evergreen tropical montane forests that are found in the Western Ghats region of India. These forests are characterized by their dense growth of trees with dark, broad leaves. Sholas are home to a variety of flora and fauna, including numerous endemic species.

The Vindhyas, option 2, and the Satpuras, option 3, are mountain ranges located in central India. They do not have Sholas or temperate forests. The Himalayas, option 4, are a mountain range located in northern India, and they have a different type of forest ecosystem, predominantly coniferous forests rather than Sholas.

Therefore, the correct answer is option 1: Nilgiris, as it is the highland in India where Sholas, the temperate forests, can be found.