Question

इंप्लीकेशन ऑफ फाइव ईयर प्लान इन द रिस्पांसिबिलिटी ऑफ़ दी​

Answer 1

law of conservation. Conservation law, also called law of conservation, in physics, several principles that state that certain physical properties (i.e., measurable quantities) do not change in the course of time within an isolated physical system.