You can fill in the blank with these words: opinion, advice, diagnosis
Recommended Dietary Allowances (RDAs) are the levels of intake of essential nutrients that, on the basis of scientific knowledge, are judged by the Food and Nutrition Board to be adequate to meet the known nutrient needs of practically all healthy persons
Answer
A lot
Explanation
A lot
1. Beneficial stress for the experiencer
2. (I’m not really sure but I think that it’s the nervous system)
3. (Not sure, sorry)