Brian works at an investment firm. He is not respected by his team members because he spends a lot of time on the Internet playing games. He does not participate in team activities or contribute to the team's work. Whenever the team receives a reward, Brian's team members feel that he is unnecessarily rewarded for the hard work of others. In the context of the dilemmas of teamwork, Brian is a .

Free rider

Explanation: A free rider is an individual who make use of or benefits from the efforts of others around him without him or her contributing to such efforts.

Brian's spends his time playing video games, he never contributes to the team's activates or effort but benefits from whatever reward the team gets for their efforts, Brian is a good example of a free rider.

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.

its d i know cause i've been googling it