The graph shows the changes in population of black bears in rural michigan during a single year. competition for food among the black bear population was most likely the greatest during the

As logic says, the competition for food would be highest when number of bears is at peak. From the graph we can see that the peaks are in months 2,4,5 and 6. If the question was at what season it was, the answer is in spring because at that season there are 3 months with high competition for food.

40 & 50 in the right corner are the complementary angles as when placed in a sum (added together) they make 90°