Which causes the ph of a solution to increase a. adding hydrogen ions b. adding protons c. adding base d. adding acid

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring