In this question have an underlined word. If food supply fails to keep pace with population, civilization will collapse - CDS English 2017 (II)

In the following items, some parts of the sentence have been jumbled up. You are…

In this question have an underlined word. choose the response (a), (b), (c) or (d) which most nearly expresses its meaning.

If food supply fails to keep pace with population, civilization will collapse.