When we talk of magnetic fields, we are referring to invisible regions of influence that surround magnets and other magnetic objects. These fields are responsible for the attractive and repulsive forces observed between magnets. Essentially, the magnetic fields are created by magnets, electric currents, as well as moving charged particles, and they extend outward from a magnet in three-dimensional space, forming a continuous loop, which returns to the magnet. The strength and direction of the magnetic field are represented by magnetic field lines, whose density indicates strength, while closer lines indicate a stronger field. With regards to the attraction and repulsion between the magnets, we can start by stating that when two magnets approach each other, the magnetic fields do interact – they can either attract or repel. Opposite poles attract each other while like poles repel. The reason opposite poles attract is that the magnetic field lines from one magnet align and merge with the field lines of the other magnet, creating a more stable configuration. As for the repulsion, the magnetic lines try to move apart, which results in a force that pushes the magnets away from each other.