Probably the major advantage of walking upright was that it freed the hands to use tools and carry (the pray).
Another advantage is seeing further than on four legs, without the need to stop walking and raising oneself for a little while to look around ( like some animals do).
The correct answer is fulcrum
Explanation: Fulcrum is a point of balance. the closer the fulcrum is to the load, the easier the work will be.
People who live in America can simply call themselves American now, as opposed to earlier when the area was divided into various countries.
<u>Explanation: </u>
This fact is the best out of the options that fits the description of the singular fact that best supports thee claim of modern life being less violent as compared to more and more of our evolutionary past.
This fact states that the people who were earlier divided into the countries and lived in a constant state of war, are now able to live together in a peaceful manner, thus stepping up from their evolutionary past and becoming less violent as they step into an era of modernization.
