Vaccination, a medical process, person is intentionally given a vaccine, contains weakened, killed, or modified form of a microorganism.

Acid rain is a form of environmental pollution in which rainfall or other forms of precipitation become acidic.

A balanced diet includes various components of food essential for maintaining good health and reducing the risk of diet-related diseases.

Phase transition is a process in which one state of matter changes to another due to changes in temperature or pressure.

There are two types of nutrition on the basis of nutrition production. Both types of nutrition are necessary for balanced Ecosystem.