Question 2 options: a. constructing oil and gas pipelines through old growth forest b. lack of regulations to limit the harvest of the medicinal plant ginseng c. replanting, after a clear cut, a monoculture of douglas fir trees on land that consisted of old-growth douglas fir, western cedar, and western hemlock d. allowing previously used farmland to go fallow and begin to fill in with weeds and then shrubs and saplings save

The question was; which of the following examples posses the greatest potential threat to biodiversity?
The answer would be; A, constructing oil gas pipelines through old growth forest. 
Biodiversity refers to the variability and variety among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems and the ecological complexes of which they are part. Human activities poss great threat to biodiversity, these include defforestation, and others like construction which involves destruction of trees and other habitats for living thing.