What two materials are part of soil? a) pieces of metal
b) once-living matter
c) small bits of rock
d) trees and grass

Once Living Matter, Small bits of rock

Explanation: CANVAS VERIFIED

Small bits of rock and once living matter

Explanation:

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

answer;

-vessels in the chest

the diagnosis of angina pectoris literally means "vessels in the chest"

explanation;

-angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease.it is the chest pain due to an inadequate supply of oxygen to the heart muscle. the pain is typically severe and crushing, and it is characterized by a feeling of pressure and suffocation just behind the breastbone.

agina pectoris is caused by reduced blood flow to your heart muscle. the blood carries oxygen, which the heart muscle needs to survive. when the heart muscle isn't getting enough oxygen, it causes a condition called ischemia