Answer:
Explanation:
Primary sources provide a first-hand account of an event or time period and are considered to be authoritative. They represent original thinking, reports on discoveries or events, or they can share new information. ... Secondary sources involve analysis, synthesis, interpretation, or evaluation of primary sources
Tripled
In the United States, the percentage of children and adolescents affected by obesity has more than tripled since the 1970s.1 Data from 2015–2016 show that nearly 1 in 5 school-age children and young people aged 6 to 19 years in the United States has obesity.2
Those are good examples of primary sources
