Final answer:
Conserved quantities in physics are quantities that remain unchanged in isolated systems, even during interactions, as dictated by conservation laws.
Step-by-step explanation:
In the context of physics, conserved quantities are best defined as quantities that remain constant in isolated systems. This concept is a fundamental aspect of conservation laws, which state that certain quantities, such as energy, charge, linear momentum, and angular momentum, are conserved. These quantities do not vary or change as a result of interactions, provided that the system being observed is isolated and does not exchange these quantities with its surroundings.
Conservation laws play a crucial role in physics, ensuring that even though systems might interact and change in many ways, there are underlying quantities that remain unchanged. These laws are applicable in various fields, including mechanics, thermodynamics, and quantum physics, and they are essential for understanding the behavior of physical systems.
In summary, among the options provided, B) Quantities that remain constant in isolated systems is the correct definition of conserved quantities in the context of physics.