As the population grows, the primary effect on water resources is that the aquifers are not recharged as quickly. Increased population typically leads to higher water demand for consumption, agriculture, and industry, which can result in faster depletion of groundwater resources. If the rate of water extraction exceeds the natural recharge rate of aquifers, this can lead to lowered water tables and reduced availability of fresh water resources.
In summary, the correct statement in response to a growing population would be: the aquifers are not recharged as quickly.