How does groundwater become polluted?

a.
pollutants mixed with water pass through permeable layers above the aquifer.

b.
factories dump their waste directly into aquifers.

c.
refuse infiltrates the water table when garbage is dumped.

d.
all of the above

Option D, all of the above, is the correct answer.

The groundwater is the rainwater found beneath the surface of the earth and in the cracks of mineral sediments. The groundwater is commonly less valuable, more convenient. The groundwater similarly to the public water also open to pollutants. This contamination of water reserves occurs when leakage of substances arises during the artificial processes such as drilling, boring, substances, and road salts and when garbage is dumped into the water reservoirs etc. Consequently, pollutants get mixed with water and pass through the permeable layers.

because of

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.