Apsychologist has a limited budget for research, so she needs to focus on a small sample of individuals who are the most likely to develop alcoholism and antisocial personality disorder. given what we know about gender differences, which group would the researcher choose?

a group of male adults                                                  

Explanation:

Sample: In psychology, a sample is defined as a group of items, objects, or people taken from a huge or large population for measurement. The sample should be typical to the population, to generalize the findings of a particular study comparative to the entire population.

In the given question, the psychologists chooses the male adult because of the stereotype that male adults consume more alcohols as compare to females. Hence, the gender difference.

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.