Answer:
its option A. bright tail feathers of peacocks during breeding season
Explanation:
Go to biology.arizona.edu They have a ton of stuff on blood types. I don’t know if this will help because I’m not in biology yet but I’ve been there and it helped a lot with some stuff. Hopefully that didn’t sound to vague. Have a wonderful day.
Answer:
Agricultural revolution, start of Neolithic era, maybe 12000 yrs ago
Explanation:
I believe the answer is respiration