Explain in your own words, what the process of creating a tornado is?

A tornado is a violently rotating column of air.

Explanation:

Tornadoes are one of the most  powerful type of weather. It generally  form a funnel shape. Large tornadoes usually form during the time of thunderstorm. There have many conditions for the creation of tornadoes. A large thunderstorm occurs in a high cloud and changes occur in wind direction.  The change in the wind direction and wind speed causes air to swirl horizontally. A funnel  is formed and the funnel of swirling air begins to suck the warm air from the ground. Eventually the funnel become larger and touches the ground and becomes a tornado.

the answer to your question is:

c. complementary base-pairing

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.