Which components make up the cardiovascular system? lungs, heart, and blood vessels

heart blood vessels and blood

Heart, blood vessels, and blood

Explanation:

The heart pumps blood around the body, the blood vessels transport the blood, and the blood is the blood itself

The correct answer is Magnetic minerals on the sea floor

The magnetic minerals behaves like the magnets that aligns themselves during the cooling process. The alignment takes place in the direction of the earth's magnetic field and becomes solidified in this way only. Normal polarity of minerals is having the same polarity like that of earth. In contrast the reversed polarity is alignment opposite to the polarity of the earth.This creates a zebra like pattern.

Thus, this zebra like pattern shows the evidence of sea floor spreading.