Answer:
A Decrease in the wolf population
Step-by-step explanation:
If the 2nd question you talk about is this "What might have caused the spike (increase) of moose population in 1995?" then it would be (A Decrease in the wolf population).
Because we can see that the red line (intersect point) (for wolf) is way lower than the blue line (intersect point) (for moose) at the vertical line "1995"