Science:Math Exam Resources/Courses/MATH102/December 2017/Question 10 (c)/Solution 1

In the graph for ${\textstyle f_{1}(t)}$ we see that the function reaches a maximum net energy gain. A possibility is that the the entire food patch has already been foraged, thus the availability of the food starts declining.

Answer: ${\textstyle {\color {blue}{\mbox{A possibility is that the the entire food patch has already been foraged.}}}}$