How is boxing a training and skill/art?

Boxing has become a popular sport for many. It's not surprisingly because it provides the best workout and challenges many of our senses and capacities. Try it, you won't be disappointed.

One of the world's oldest, and most celebrated sports, boxing, has proven to be popular among many people, for a variety of reasons. From its emergence in ancient Greece, through early 18-century England where it was considered the "gentle" art of self defense (albeit a bare-knuckle form of defense), and an introduction of the Marquess of Queensbury rules (1866; scoring system that required gloves), boxing has continually been refined and perfected.
In the 21st century, professional boxing attracts major sponsorship deals and makes fighters millionaires. Amateur boxing is also growing exponentially. Those looking for a challenge are attracted by the allure of the benefits to be realized. Indeed, boxing is increasing in popularity almost daily, with movies like "Million Dollar Baby" and massive pay-per-view events attracting millions of viewers.

Boxing has become a global phenomenon with tremendous cross-over appeal. The fitness industry has latched on to the boxing popularity with box-out classes and the like. Why has boxing become immensely popular and how does one become proficient at its practice? The following article will shed some light.

Imbecile

Speed jumprope for boxing Training.

I disagree with you, to be honest runners,basketball players etc could also just come 'from the street' ,if we neglect tears,blood and sweat they spill during the trainings and matches...
-https://en.wikipedia.org/wiki/Martial_arts

You are mistaken and the difference between a trained boxer and a street fighter is vast and not comparable in any way. The same for the difference between a street fight and boxing match thay are most certainly not the same. Boxing has declined in popularity due to MMA but the training and skill of boxers of today has not diminished.