Untouchability on the basis of cats one of the major social problems​

Untouchability on the basis of caste is one of the major social problems because it creates social differences in our human society which causes inequality. 'Untouchability' on the basis of 'caste creates' a social difference amongst the people.

Explanation:

answer; /// i do believe the correct answer is ( a

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.