Answer:
Population Health and the environment are multidisciplinary because they are affect and get affected by causes of multiple origins. That is a person's health is a product of their food, social conditions, lifestyle, pollution, legal and hygiene factor, etc. Environment is the same thing.
I WILL GIVE BRAINLIEST
Sociology - year 9
Positives of overt and covert observers
Explanation:
overt-doesnt disturb the normal behaviour of the group so there is a bigger validity.
covert-rewuires no deception and participants are able to give their own informed consent.