What are the reasons for dinosaures disappearance?

The main answer you would have heard of would be the giant meteor, but that's not the main reason. There were Tsunami's, Volcanic Eruptions and ect and that could cause climate change and then the plants would die there for the Herbivors ( plant eateing dinosaurs ) would die out because of the lava and stuff killing the plants and then the Carnivors ( Meatv eation dinosaurs ) would die out because all of the herbivors would have died out.

By The way this was answered by a 10 year old boy!