Heloooooooooooooooo.............
Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges.
Sun, wind, ocean waves, tides and geothermal heat
A diverse population is usually more stable because it is better at resisting disease because of simple biology.
