High energy physics deal with the:

Explanation

High energy physics, also known as particle physics, deals with the study of the fundamental particles that make up the universe and the interactions between them at incredibly high energies. It investigates the smallest constituents of matter and the fundamental forces governing their behavior. This field explores particle accelerators, collisions at high energies, and the creation and behavior of particles under extreme conditions to understand the fundamental nature of the universe at its most basic level.