Two 9-year-old boys are watching a television replayof a boxing match between Muhammad Ali and JoeFrazier on a program called "Great Fights of the Century."Since the fight took place before they were old enoughto remember the outcome, neither knows who won andthey bet on the outcome. Tom bets on Ali and Tim betson Frazier. Does risk exist in this situation? For Tim? ForTom?

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.

answer; (true);

answer; shipments were made easier,and trade was easier;