The most important caution for all scientists particularly those studying human development is to

Probably be ethical about their experiments. (For example, the cure for a certain disease was found by using the cells of a deceased woman, however without the consent of her family, they used it for research, which was a revolution in one way, but violates ethics and morals)

the answer is true .

stable food supply,social structure, government,religion,culture/art,technology and writing/language;