It would normally be the last phase
Based on the graph, you can see that the population of grass is high, which indicates that the one that feeds on them has been affected. Logically, the rabbits are those that feed on it and as you can see, their population has lowered, and so did the snakes and the hawk.
So among the choices, B. a disease in the population of rabbits may have lead to the graph shown.
Answer:
attatch the images of the Petri dishes so we can further help in understanding this question
Quartz also has a hardness level of 7.5, so rubbing another mineral with a 7.5 hardness on it will not effect the quartz.