What is a example and non-example of ratification

The term “ratification” describes the act of making something officially valid by signing it or otherwise giving it formal consent. For example, ratification occurs when parties sign a contract. The signing of the contract makes it official, and it can then be enforced by law, should the need arise.

Explanation:

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.

answer; a cost benefit analysis;