Scientists have noted a decline in the number of all mushroom species dating back to the early 1900s. In addition, annual crops
of edible mushrooms in France and Germany have declined since 1950. One hypothesis explaining the decline is that edible fungi are being overharvested. Global warming and air pollution have also been considered as part of the problem. What evidence helps to exclude overharvesting as the cause of the overall decline? A) a similar decline in edible North American mushrooms B) absence of mushrooms near coal-burning powerplants in Indonesia C) increase in mushroom species in a region of tropical South America D) declines in poisonous, non-edible mushroom species in cool climates
The correct answer should be D.) Declines in poisonous, non-edible mushroom species in cool climates. Although question B does provide evidence that Global warming could be the cause of the declines, it still doesn't disprove the theory that overharvesting could be the cause as well. Question C could be caused by a number of things, such as deforestation, a local change in climate, removal of agricultural pests, ect. Question A supports the hypothesis that overharvesting is the cause of the decline, instead of disproving it. Hope this helped!
