2. As the concentration of a solution increases how does the amount of light absorbed vary?.

Absorbance increases.

Explanation:

Recall that absorbance is directly proportional to concentration as illustrated by Beer's Law:

Where A is the absorbance and C is the concentration of the solution.

Therefore, as the concentration of a solution increases, the amount of light absorbed (absorbance) likewise increases.

the answer is d.) potassium