Tia is always talking to her friends about how prevention is a better investment in your health than treatment. if that is her attitude toward health, which of the following would you expect her to do?
eat a well-balanced diet to increase energy and immunity
exercise frequently to keep her body looking good
use late night hours for school work so daylight can be used for fitness
add the latest diet supplements to her daily fitness routine to maintain low body fat levels

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

What is the hormone in your brain that makes you feel happy?

How could you find out if that advice is based in scientific evidence?