What letter is this "Ñ ñ"

"Tilde" is a repurposed Spanish word used in the English language to refer to that accent mark that Spanish speakers refer to as the "virgulilla" ( ˜ ), the mark over the ñ or enya.

Explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?