The "Class of Physical, Mathematical and Natural Sciences" encompasses disciplines that study the natural world through observation, experimentation, and mathematical analysis. This class includes fields such as physics, chemistry, biology, and mathematics, which aim to understand the laws governing matter, energy, and living organisms. Researchers in these fields utilize the scientific method to formulate hypotheses, conduct experiments, and analyze data. This approach leads to discoveries that enhance our understanding of the universe, from the smallest particles in quantum physics to the vastness of cosmology. The knowledge gained contributes to advancements in technology, medicine, and environmental science.