What has led to millions of u. s. children and adolescents being overweight and obese?
a. computers and technology
b. stay-at-home parents
c. medical setbacks
d. pesticides

If birth rates fall below the replacement level, then a country is in which stage of demographic transition? a. urbanization/industrialization b. mature industrial c. postindustrial d. pre-modern

Based on the chart, what are the three most effective methods to protect against pregnancy?

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing