Answer:
Option D, Tundra
Step-by-step explanation:
Tropical forests have trees of great height and broad leaves of green color. These broad leaves trees generally reproduce asexually by vegetative means such as reproduction from leave, stems, or roots. However, some have the capability to reproduce sexually as well
Pine trees have male and female sexes on the same plant, hence they reproduce sexually.
Tundra has low scope for tree and plants growth. Hence, it mainly consists of Lichens, mosses and shrubs. Mosses reproduce by producing spores, lichen and shrubs also reproduce asexually.
Hence, option D is correct