Answer:
The correct answer is option b. "grass".
Explanation:
The biotic part of an environment is comprised of all the living components of a particular region. In this example, grass is the biotic part of an environment because grass is comprised of plants, which are living organisms. The scientific name of the plants that usually form the grass is "Poaceae" or "Gramineae" and includes cereal grasses, bamboos, cultivated lawns and pasture.
