1) What were the circumstances for the extinction of organisms like dodo,passenger pigeon,quagga?

2) Do human beings have any role in it?

(Please answer fast)

Every organism need their natural habitat,a type of food they eat ( like herbivores eat plants) and and proper breed to maintain their population and if they do not get these circumstances they became endangered species and some time they extinct and human being play a major role in extinction of these animals like dodo,passenger pigeon,quagga by destroying their habitat, hunt them