Q: what event within the food chain might lead to the graph shown below? a. a disease in the population of rabbits b. a disease in the population of snakes. c. a disease in the population of hawks d. it is impossible to tell which of the above occurred

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.