The Quark Model is a fundamental theory in particle physics that describes the composition of hadrons, which are subatomic particles like protons and neutrons. According to this model, hadrons are made up of smaller particles called quarks. There are six types of quarks, known as "flavors": up, down, charm, strange, top, and bottom. Quarks combine in groups to form hadrons, with protons and neutrons being the most common examples. In the Quark Model, quarks are held together by the strong force, mediated by particles called gluons. This model helps explain the properties of various particles and their interactions. It is a key component of the Standard Model of particle physics, which describes the fundamental forces and particles in the universe.