Controls are implemented during which step of scientific inquiry? a. observation b. hypothesis c. analysis d. experimentation

 d. experimentation

Explanation:

A scientific inquiry can be define as the fact finding inquiry of the natural process occurring in nature which is proved by a suitable scientific methodology. The controls are the benchmark variables over which no experiments are performed. These are kept as standards so as to compare the changes occurring on the dependent variables.

On the basis of the above explanation, Controls are implemented during experimentation of the scientific inquiry.

answer; ////increased water pollution; ///////////////////////