Answer: A. True
Step-by-step explanation:
As a result of the strain on resources, the 'economy' so to speak had to adapt to this. They did this by doing what successive populations have done since then, turning to technology and in this case in Agriculture.
By domesticating animals and rearing them as well as Plant cultivation, the early humans were then able to feed their populations without relying on the hunting and gathering thereby reducing the strain on resources and even enabling population growth.