Final answer:
In step three of the process, you should weigh most heavily the identification of unknown quantities in the problem.
Step-by-step explanation:
In step three of the process, the most important thing that should be weighed heavily is identifying the unknown quantities in the problem.
To determine what needs to be determined in the problem, you should make a written list of the unknown quantities. This helps to clarify what information is missing and what needs to be calculated.
For example, if you are solving a chemistry problem, step three would involve identifying the unknown quantities such as the mass of a substance or the volume of a solution.