What causes the equatorial climate in a rainforest?

Ok I have added a bit more after talking to my dad but it still needs to be a page long and i still don't have enough: The rainforests have a equatorial climate because the rainforests are based around the equator and nowhere else in the world. The equatorial climate is always hot, because the earth spins on its axis but also tilts, and that is why we have seasons whereas in the tropical rainforests and countries near the equator are always hot. This being the equatorial climate. I need more!!! Help?