Research indicates that using electronic devices before bed may make it difficult for people to fall asleep. the light appears to interfere with the body's ability to create this hormone , which is responsible for sleep and wake cycles.

a. melatonin
b. endorphins
c. eustress
d. progesterone

Wanting to know the rules and the right person to ask for are characteristics of the safety reassurances required by preschoolers. infants. school-age children. toddlers.

Life expectancy in the united states is (76.4 for men and 81.1 for women). life expectancy is not the same as healthy life expectancy. healthy life expectancy is the number of years a person is expected to live in this number is obtained by subtracting years spent in poor health from overall life expectancy. the world health organization (who) calculates healthy life expectancy in 194 countries. the united states ranks twenty-ninth in the world using this measurement, with an average of of healthy life expectancy. singapore ranks number one (76 years), and japan is number two (75 years).

To prevent infants and young children from choking, cut their food into pieces that can be easily swallowed. true false