In a(n) , one or more variables are identified and controlled or manipulated so that data can be obtained about how they influence the variable of interest identified first. a. categorical study b. experimental study c. variable study d. observational study

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.

b) the bill goes to the president.

hope this

answer; delirium is a common adverse reaction seen when elderly patients take diphenhydramine;

answer; biological;