How did the buddah die?

Answer 1

According to the Mahaparinibbana Sutta of the Pali canon, at the age of 80, the Buddha announced that he would soon reach Parinirvana, or the final deathless state, and abandon his earthly body. After this, the Buddha ate his last meal, which he had received as an offering from a blacksmith named Cunda. Falling violently ill, Buddha instructed his attendant Ānanda to convince Cunda that the meal eaten at his place had nothing to do with his passing and that his meal would be a source of the greatest merit as it provided the last meal for a Buddha. Mettanando and von Hinüber argue that the Buddha died of mesenteric infarction, a symptom of old age, rather than food poisoning. The precise contents of the Buddha's final meal are not clear, due to variant scriptural traditions and ambiguity over the translation of certain significant terms; the Theravadatradition generally believes that the Buddha was offered some kind of pork, while the Mahayanatradition believes that the Buddha consumed some sort of truffle or other mushroom.