Define groundwater, and list some anthropogenic (human) sources of groundwater pollution. Why do many scientists consider groundwater pollution a greater problem than surface water pollution

Explanation:

Groundwater is the freshwater present below the earth's surface. It originates from the rain, ice, melting snow.

Some anthropogenic sources of groundwater pollution are

Groundwater pollution has more problems than surface water pollution because groundwater is mostly hidden and it is very difficult to view, manage and monitor.

Groundwater holds its contamination and pollutants that cause pollution whereas surface water rinses their contamination and pollutants.

the bullets go in this order.

4, 1, 3, 5, 2

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.