According to the research of carstensen, what is "the most reliable finding in social gerontology"?

Older people tend to reduce their social contacts.

Explanation: Gerontologists are social scientists responsible for studying the aged and the aging process. Laura Carstensen, a psychologgy professor at Standford University, studied the emotional experience and cognitive processing of people from early adulthood to advanced elderly years. According to Carstensen research, older people tend to reduce their social contacts.  

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; 5% is your answer; ///good luck