"Animal sacrifice is the ritual killing and offering of one or more animals, usually as part of a religious ritual or to appease or maintain favour ...
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with a deity. Animal sacrifices were common throughout Europe and the Ancient Near East until the spread of Christianity in Late Antiquity, and continue in some cultures or religions today. Human sacrifice, where it existed, was always much rarer.
All or only part of a sacrificial animal may be offered; some cultures, like the ancient and modern Greeks, eat most of the edible parts of the sacrifice in a feast, and burnt the rest as an offering. Others burnt the whole animal offering, called a holocaust. Usually, the best animal or best share of the animal is the one presented for offering." - (en.wikipedia.org 01.12.2021)