The correct answer is:
C 1907, because there were fewer snowshoe hares than lynxes.
Intraspecific competition for food occurs when individuals of the same species compete for the same resources. If the lynx population is about 3,000 but there are fewer snowshoe hares than there are lynxes, this would lead to increased competition for food among the lynxes. Therefore, it's reasonable to conclude that 1907 experienced increased intraspecific competition for food.