Answer:
Dr. Reside's experiment can not be considered effective because his study has only treatment subjects group and lack of control group. That's why his study can be very good but not valid without control group.
In his study, he concluded that 80% children after therapeutic treatment decreased the activity level which can be true but not valid without control group because when he use control group in his study then we will be able to compare the normal or control group and treatment group. Then the study will be valid and effective as well.
Physical activity is like walking a dog and just doing day to day things with not alot of effort.
C- to describe the amount of movement required for maximal exertion
OK so the answer to your question will be Increased. Because everything has gone up in price because wages have gone up as well so there is more money to spend on things.
