The four fundamental interactions are strong, electromagnetic, weak, and gravitational. The strong interaction provides the bonding of protons and neutods in atomic nuclei. Electromagnetic interaction is responsible for the bonding of electrons in atoms with their nuclei and the bonding of atoms in molecules. Weak interaction is manifested in the relatively slow decay processes of some elementary particles and atomic nuclei. All particles participate in gravitational interaction.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.