Answer: Farming
Explanation: Plowing the land is the first source of wealth.
Human reproduction<span> takes place as internal fertilisation by sexual intercourse. During this </span>process<span>, the male inserts his penis, which needs to be erect, into the female's vagina, and then either partner initiates rhythmic pelvic thrusts until the male ejaculates semen, which contains sperm, into the vaginal canal.</span>
It was exposed to oxygen. This is called oxidation and it's a chemical reaction, meaning it can't be reversed.
I'm not even going to bother reading what the question is because I really don't care enough to look 3 inches to my left and read the question, so Im writing this to explain to you that your life sucks
