Which of these structures provides the muscle cells in the heart with a constant supply of oxygen? a. the superior vena cava b. the pulmonary artery c. coronary arteries d. systemic veins

Earths energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your homes electricity, and explain why you chose that source. can someone give me some ideas, i’m kinda confused.