Identify the type of body movement
placing an index finger on lips to request silence
regulator
illustrator
emblem
adaptor
affect display

The type of body movement in placing an index finger on lips to request silence is that of an emblem.

Explanation:

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.

your answer is "graduates" hope this