answer :
high, upper-middle, lower-middle, and low income countries. Least developed countries, landlocked developing countries and small island developing states are all sub-groupings of developing countries. please mark me as brainlist i hope it helps you
Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
I believe it is because she is wearing a dress.
Scout is a tomboy, and she never wore a dress in her life, having spent most of her childhood around boys. Now, she has to start going to school and she has to dress properly, like a good girl, which is something she is not fond of. So she is embarrassed of people seeing her in a dress which is why she doesn't want to come into the breakfast room.
To find gold and easier route to Asia
Different resources, different hardships.
