Where did most polling take place prior to the 1920s and 1930s? O outside polling stations
O over the telephone
O in public meeting spaces
O in homes

Prior to the 1920s and 1930s, most polling took place:

O in public meeting spaces.

Explanation:

Public meeting spaces have been used for so many political activities.  Before the established of modern polling stations, which are equipped with necessary infrastructure, most polling had taken place in public meeting spaces.  This is because such spaces have remained the gathering point for the public and for political and social activism.

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.

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