10 points if you answers in explaitontion I’ll make as  brilliant!!! What is the primary difference between the current sleep practices in the United States and historic sleep patterns ??

f so, the primary difference between current and historic sleep practices is that people now almost always have their babies sleep away from the mother. Historically, infants would more generally sleep with their mother, but we have moved away from that, largely because of fear of smothering children by rolling over on them.

Explanation:

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.