The correct answer is A. Flora.
Flora is the plant life of a particular region or time period. It can include both wild and cultivated plants. The study of flora is called botany.
Fauna is the animal life of a particular region or time period. It can include both wild and domesticated animals. The study of fauna is called zoology.
Landscape is a general term for the natural scenery of a region. It can include both the plants and animals, as well as the landforms, water bodies, and other features of the environment.
Environment is the natural world that surrounds us, including the air, water, land, and all the plants and animals that live in it.
In conclusion, the plants and vegetation of a region are called flora.