The correct answer is: d) Alpine scrub.
Alpine scrub is a type of vegetation found in the higher elevations of the Khasi and Jaintia Hills. It is characterized by low-growing shrubs and herbs that are adapted to the cold, dry climate. The plants in alpine scrub are typically small and have thick, waxy leaves that help to retain moisture. Alpine scrub is an important part of the ecosystem in the Khasi and Jaintia Hills, as it provides habitat for a variety of animals, including birds, insects, and small mammals.
The other options are incorrect because they do not describe the vegetation found in the higher elevations of the Khasi and Jaintia Hills. Tropical rainforest is a type of vegetation found in the lowlands of the Khasi and Jaintia Hills. It is characterized by tall trees and a dense canopy. Subtropical pine forest is a type of vegetation found in the mid-elevations of the Khasi and Jaintia Hills. It is characterized by pine trees and a sparse canopy. Temperate forest is a type of vegetation found in the higher elevations of the Khasi and Jaintia Hills. It is characterized by deciduous trees and a dense canopy.