but Abel`s offering was to sacrifice" some firstling`s of his flock" oh, and lets not forge" their fatty pieces". ?
s3: The deity wanted to reward clear thinking. The fatty pieces are a better fuel for burning, and fat is not good nutrition. main reason for insight was, that all these people, even animals were total vegetarians. until the deluge. What was Abel going to do with all the carrion, the meat, after milk and wool, leather was used? even the dogs would not eat meat; so: what a smart move to incinerate it. (good fertilizer too).
the bible is a book of magic, talking snakes, animals created after humans, sun standing still (actually does, the earth is turning)