Answer:
The correct answer will be option-how nature would act without manipulation.
Explanation:
A scientific experiment is designed in a way that it can be categorized into two groups:
1. experimental samples-in which the variable to be studied is present and other variables can be manipulated.
2. Control group: samples in which the variable to be tested is not present and thus contains only independent variables. The control group provides the data which shows how nature acts when no manipulation is done to the variable which acts as a reference group to the experimental group.
Therefore, the selected option is the correct answer.
