I think t or r............
A.) The radius of vessel has the greatest affect on blood flow.(brainliest plz)
Answer:
D, but if feel sorry my second guess will be B
What factors influence the input and output of carbon through Earth's spheres? The oceans on Earth act as carbon sinks. The combustion of fossil fuels contributions to an increase in atmospheric carbon dioxide. Animals are solely responsible for the release of carbon dioxide via respiration