28) B

Let us start by understanding the graph first.
As population in year n increases, population in year n+1 also increases.
However, there comes a point where the population of snaffles in year n + 1 starts to decline as population of snaffles in year n increase.

A – Wrong
If births = deaths, then the population would be constant.

B – Correct
Since population of snaffles in year n increases, food demand overtakes food supply causing some of the snaffles to die out in the following year.

C – Wrong
We cannot work out number of cubs produced. Completely irrelevant.

D – Wrong
There is no information regarding time of the year.

E – Wrong
At the start of the graph, populations of snaffle in year n and n+1 are low.

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