Between 1970 and 2012 the share house holds that were married couples with children under 18 halved from 40 percent to 20 percent. what social factors impacted this change?

Two-parent households are on the decline in the United States as divorce, ... By 1980, 61% of children were living in this type of family, and today less than half (46%) are. ... The share of children living in a two-parent household is at the ... In the mid-1970s, a 40% plurality of mothers

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.