Option 1: Neutrophilia refers to an increase in the number of neutrophils, which are a type of white blood cell. Neutrophilia is not related to cell or tissue death, so it is not the correct answer.

Option 2: Nephrosis is a condition characterized by damage to the kidneys, resulting in the leakage of protein into the urine. It does not specifically refer to cell or tissue death, so it is not the correct answer.

Option 3: Necrosis is the correct answer. It refers to the premature death of cells or tissues in a living body. Necrosis can occur due to various reasons, such as injury, infection, or lack of blood supply. It is often associated with inflammation and can have harmful effects on the surrounding tissues.

Option 4: Neoplasia refers to the abnormal growth of cells that can lead to the formation of a tumor. While neoplasia can ultimately result in cell or tissue death, it does not specifically refer to the process of death itself, so it is not the correct answer.

In conclusion, the correct answer is option 3: Necrosis.