Which is regarded as the most fundamental of the physical sciences?

Physics is regarded as the most fundamental of the physical sciences because it serves as the foundational basis for understanding the principles governing the natural phenomena of the universe. Physics explores the laws of matter and energy, motion, force, and the fundamental interactions between particles, which are essential concepts that influence all other branches of science.

Chemistry is often seen as a more specialized field that builds upon the principles of physics. It focuses on chemical reactions, molecular structures, and the interactions of atoms and molecules. While biology studies living organisms and their processes, it too relies on physical principles for understanding mechanisms at a cellular and molecular level.

Astronomy, though a significant field that examines celestial bodies and the universe at large, draws on principles established in physics to interpret the behavior and interactions of galaxies, stars, planets, and other cosmic phenomena. Thus, since physics lays the groundwork for understanding all these scientific domains, it is considered the most fundamental of the physical sciences.