Answer:
Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
Gregor Mendel, via his work on the pea plants, found the basic and essential laws of inheritance. He discovered that genes occur in pairs and are inherited as different units, one from each parent. He traced the segregation of parental genes and their appearance in the offspring as recessive or dominant traits.
Mendel's work gave three laws of inheritance, that is, the law of segregation, the law of dominance, and the law of independent assortment. Each of these can be comprehended via looking through the procedure of meiosis.
B is the answer. Sharks need salt water to survive to make the breathing and blood pump through their bodies.