The Abel inference is interesting.
However, Gen 9:3-10 has:
***3-4 Every creature that is alive shall be yours to eat; I give them all to you as I did the green plants. Only flesh with its lifeblood still in it you shall not eat.
5 For your own lifeblood, too, I will demand an accounting: from every animal I will demand it, and from man in regard to his fellow man I will demand an accounting for human life.
6 If anyone sheds the blood of man, by man shall his blood be shed; For in the image of God has man been made.
7 Be fertile, then, and multiply; abound on earth and subdue it."
8 God said to Noah and to his sons with him:
9 "See, I am now establishing my covenant with you and your descendants after you
10 and with every living creature that was with you: all the birds, and the various tame and wild animals that were with you and came out of the ark.***
Gen 9:3-4 implies that prior to the flood, green plants were the food given by God to Noah. This assertion is consistent with :
I give you every seed-bearing plant on the face of the whole earth and every tree that has fruit with seed in it. They will be yours for food. And to all the beasts of the earth and all the birds of the air and all the creatures that move on the ground - everything that has the breath of life in it - I give every green plant for food. And it was so." (Genesis 1:29,30)
After the flood, the Lord gives animal flesh. This makes sense as green plants would have died in the deluge.
However, Gen 9:5 states an accounting must be made for blood, inclusive an accounting for animal blood.
Gen 9:9 further elaborates on a covenant God establishes in context of this accounting, not only for human blood, but God extends His covenant to the animal kingdom 9:10
Therefore, it is clear that by God’s demand of an accounting, a sacrifice be made by Noah and his descendants, for any and all bloodshed including animal.
Making the sacrificial offering establishes a ritual, and a priesthood of the ritual, aka rite or order.
**Melchizadek and his order is enigmatic for several reasons:
*]The Pentateuch is dominated by 4 distinct authors of varying writing styles. However, as I recall, the Gen 14 fragment containing the story of Melchizadek is not written by any of those 4 dominant authors. Rather, a mysterious 5 author with unique writing style penned the verses. “He and his style” appear nowhere else in the bible.
**]Melchizadek is said to be a priest, therefore “rite, ritual, and order” follow. The priesthood ensuing from the covenant God made with Noah and the animal kingdom, is a rite of accounting for bloodshed. *
*]Melchizadek " being a priest of God Most High", and offering bread and wine, must therefore be bound by to God Most High with another covenant.
And what is this covenant between Melchizadek and God Most High
Praise and Glory be to you Lord Jesus Christ!