Answer:
The statement "We should protect the environment" is based on normative analysis.
A normative analysis is a type of analysis that focuses on how things should be or ought to be, based on ethical, moral, or value judgments. It involves making recommendations or prescriptions for action based on a set of principles or standards. In this case, the statement "We should protect the environment" is based on a moral or ethical judgment that protecting the environment is the right thing to do.
The other statements do not involve normative analysis. The statement "The temperature in the office room is 22 degrees centigrade" is a descriptive statement, while the statement "When the burner beneath a pot of water on the stove is turned on, the water will heat up" is a statement of fact. The statement "Mario is 24 years old" is also a statement of fact.