Free points ( I'm just Curious) If you were to live another life, how would it be if you lived it backwards? (old to young)

Honest opinions Please:)

[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 can friends provide to affect mental health positively? a)peer pressureb)challengesc)conflictd)com panionship

Is it bad to eat a whole cake and tub of ice cream by your self (doing it rn and my mom yelled at me)