You have to firstly understand what the Bible is. To understand
what the Bible is you need to know what it is not.
It is not a science text book.
It is not a book on logic.
It is not book on philosophy.
So what is it?
It is a book on people's encounters with God. People's
relationships with God. It is better that you write your own bible;
that is, an account of your own relationships with God.
Answers to your questions by asking you some questions:
1. Did God create you or did your parents?
2. If you think that not every animal can fit into Noah's ark, then
they did not. The Noah's ark story was an account of Noah's
encounter with God. You can think of Noah's ark story like it is
somebody's story about his encounter with God during the Asian
Tsunami. The important point of the story is the account of his
encounter with God and not the seismic conditions that led to the
Tsunami. He is not a geography professor. So he would write based
on his understanding of what he thinks caused it. It is not
important because he is not writing an geography text book.
We cannot assume that Naoh was the only survival. To Noah, it
certainly looked that way. We cannot even assume that the whole
world was completely inundated; but to Noah, it certainly looked
that way.
3. We all die sooner or later and if not from this then from
something else. God gave man a brain and a choice. Man makes his
own choices for better or worse. Even if you become a Christian,
you still make your own choices and suffer the consequences.
If you are carrying out God's will for you in your life,
then:
Even though I walk through the valley of the shadow of
death, I will fear no evil, for you are with me. Your rod and your
staff, they comfort me.
4. Where do animals go? Same as where humans go. To put it in
another way, Humans go where the animals go after they die; unless
a man is Born of The Spirit. Everybody and animals are born of
water; and unless a man is born of water and of the spirit; man and
animals, those born of water, go to the same place when they
die.