High concentrations of fertilizers and nitrates in surface water can cause 1. pH of surface water to increase?
2. temperature of ground water to decrease
3. an increase in dissolved oxygen levels
4. an increase in algae blooms caused by eutrophication

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

weathering is the answer.

the titanic would be the correct answer

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.