Anacondas and boa constrictors are the same species of snake which did not live in the American West where cowboys would have been. A garden snake is not a particularly feared species of snake either, with it lacking in poison. The water moccasin would be the correct answers because it possessed a very dangerous venomous bite that could be potentially fatal.
As a result of the neolithic revolution, by 3,000 bce the world’s human population grew to according to estimates 35-75 milion so last option is most correct
