What is the difference percentage of people living in cities from 1790 to 1920

Why is it important to know the difference between stressors we can control and those we can't? a)we can neglect the effects of uncontrollable stressors and focus on the controllable ones. b) it gives us a sense of power to know that we have control over certain stressors. c)it us come up with strategies to reduce the effects of a stressor.

Viruses can cause the following, check all that apply. a. sore throat b. measles c. ear infection d. flu e. chicken pox

Is it bad to have a headache all day long?