Answer:
The major blood vessels connected to your heart are the aorta, the superior vena cava, the inferior vena cava, the pulmonary artery (<em>which takes oxygen-poor blood from the heart to the lungs where it is oxygenated),</em> the pulmonary veins (which bring oxygen-rich blood from the lungs to the heart), and the coronary
I think the answer is evolution.
I believe the correct answer is upwelling. Lets say we have producers such as plankton. well upwelling currents bring dead matter from the ocean floor up to the surface, creating plankton.
