Hi Ace22704,
Answer - natural observation
I think this experimental method is a better option because its in a natural environment where the kids dont know whats happening unlike the suveys where you ask them questions which is probably a bad idea because they might feel scared and just change their minds.
You live life to the fullest
answer of the question given in figure
Answer:
Better healthcare!
Better Sanitation!
Better Nutrition!
Better Working Conditions!
2) Lie expectancy !
3) Health!
<u>Hope that helps! :)</u>
<u />
Antibodies, antigens are the bad things antibodies fight :)
