delinquent noun [C]. âº a âperson, usually âyoung, who âbehaves in a way that is âillegal or not âacceptable to most âpeople: âjuvenile delinquents.
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). Comments. Report.
That may make sense, even to a chimp, but it's not all that easy for a chimp to walk upright. Unlike humans, for example, a chimp can't stand on one leg and let its leg bones carry the weight. A chimp has to use muscles for that, because its legs are structured differently, and that can be tiring.