Question: Why did animals have to die in the great flood?

The answer is that it made a good story. It is the god character in the story setting up a plot device to introduce the concept of a new beginning.It's much like the absurd Exodus saga, stories written to earn a nights lodging and a meal or three.

So far the evidence is that most of the Bible stories are folk tales. The Flood never happened, Exodus never happened, the Conquest of Canaan never happened, there was no Garden of Eden, but that does not mean there is not things to be learned from the stories.The two Biblical Flood myths serve a purpose, of a God that regrets creating life and so purges it saving only the select few; the Chosen Ones; a who then later swears to never repeat that act of wanton destruction. It's a very human God, similar to all other rulers, capricious and destructive but then returning to rationality. And it allowed a people to claim preference and superiority; from the God they created if not from the rest of the world, the universe and reality.Remember, the Hebrews were never a significant power, never respected, never relevant except within their own mythos and mythology.

The only way you could prove that is by presenting evidence that could be critically examined.Where is the evidence that GOD speaks to anyone?

Spy vs Spy comes to mind.

The Book of Enoch is included in two of the Canons, the Ethiopian Long Canon and the Eritrean Orthodox canon however parts from it are included in Jude and even Jesus is quoted as referencing it. It seems it was pretty popular about the time Jesus would have been living.But if you get a chance to read it I think you'd get a kick out of it. It's definitely a fantasy comparable to Star Wars or Star Trek but certainly not on the same level of inspiration of Lord of the Rings.

Remember, the Mainstream Protestant denominations don't make the same claims as the Fundies or "Bible Christians". And of course those that do claim what you seem to assert are in denial about so much that is included, particularly all the supposed God Inspired contradictions and misinformation that does exist in the Bible stories.Those who lay claim to having the Ultimate "TRUTH" have faith in that Truth in spite of any evidence. If you look closely at the actual claims made by such denominations as opposed to the practice you find that those who actually create such Statements of Faith play it safe and cagey; they include statements like "in the original manuscript are inspired and without error". Of course there are no original manuscripts for anything found in any bible story in any Canon.