Please help me right now ASAP

Top: The grasshopper population would begin to have a dramatic increase because of the lack of being eaten if the frogs disappeared and the snakes would decrease in population because of less food availability.

Bottom: All of the organisms in the food chain are equally as important because a drastic change would occur if one disruption was made.

The most plausible answer is b, duration. the given amount of time is considered how long it last for.

Must be negative.substance increases