Answer:
Dinosaurs become extinct about 65 million years ago. The probable reason of their extinction was climatic changes. Dinasaur extinctions was named as "The Cretaceous Tertiary extinction or K-T extinction", it was said that the big meteorite crashed into Earth, changing the climatic condition. Ash and gas spewing from volcanoes suffocated them and food chain imbalances lead to extinction of dinosaurs.
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