Veins .

produce red blood cells
are only found in the heart
usually carry deoxygenated blood
carry blood away from the heart

There is only one answer.

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.