Identify correct statement from the following 1)A hypothesis is a possible that can be tested.
2) Variables are the factors that can affect the outcome of investigation.
3) Always hypothesis will be true
4) If hypothesis is incorrect test can be done with other variables

The answer is statement 1, 2, and 3

Explanation:

A hypothesis is a starting point for further investigation, therefore a hypothesis will always be a possibility at least until it is tested.

Variable is a factor that is liable to vary or change.

A hypothesis without being tested is merely a statement or an explanation made on the basis of limited evidence. Therefore it is unsure whether the said statement is true or not.

A hypothesis can still be proven by further investigation with different variables

answer: that would be cheating

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.