Answer:
Biblical Accounts, Archaeological Survey, written reference documents, and Folklore.
Step-by-step explanation:
The flood is apart of the Genesis flood narrative, where Noah is warned by God about the flood and ask him to build an Arc for survival. According to some of the historian, this flood never happened, but some believed that it did happen with the references to the Biblical account in the old testament (Book of Genesis) and by the tales which have been passed from one generation to another. Archaeological evidence also shows the findings of the arc, with the written source found separately from the Bible.