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)

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

the main idea of monster inc is good and evil

if im wrong correct me but have a blessed day!