The placebo effect is a procedure in which a patient is made to believe that a drug has a direct on the person. Therefore improving his/her symptoms from the said disease that he/she is experiencing. It is directly injecting or making a procedure using alternatives. The idea is that the patient would believe such measures were done and that they will be cured from their diseases. There are no video clips available on you questions but I hope this helps.
This is right because the kids will need all the help that they can get
I believe the answer would be digital.
"For an e-portfolio, you must have digital copies of all documents."