Which is a class of extremophile?

a. fungus

b. pathogen

c. halophile

d. protist

need it fast

The correct answer is option C, halophile

Reason -

Halophiles are organisms that live in extreme climatic conditions such as high level of salt concentration which is five times larger than the salt concentration of the ocean for example Dead sea, the great salt lake, evaporation water bodies etc.  

Halophile have enzyme which causes selective import of K+ ions that regulates the osmotic pressure by increasing the internal salinity.  

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explanation:

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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.