Solution:
A general consequence of comparative experiments is that they can lead to important decisions at the goal level. If a comparative study is established between a population, subjected to some variable of interest related to the environment, water, and food, this will lead to important scientific, political, economic, or social administrative decisions, for example, if the presence of carcinogenic elements present in samples of water, food or in specific environmental zones, through a comparative study in a given population, the conclusions of this study can generate alternatives, solutions or actions to mitigate or eliminate the damage caused by the agent carcinogenic.