Choose three possible pollutants to ground water.

fertilizer/chemicals
trees
animal feces
oil/gas spills
rocks

fertilizer/chemicalsoil/gas spillsanimal feces

Explanation:

Fertilizers and chemicals are important contaminants of water and enter ground both directly and indirectly. In the case of Karst landscapes, the contaminated water infiltrates into the groundwater through underground streams or percolation. Oil and gas spills also pose a serious problem for groundwater contamination as they can pollute aquifers near fracking zones and other oil extraction areas. Animal feces are more of a problem in the modern age due to large-scale commercialized animal farms. Unless the waste from these facilities is controlled, it can runoff into fields and rivers and eventually seep into groundwater reserves.

Argon, carbon-14, and carbon-12

Answer collision and mountain formation;