Butterflies of the genus colias live in the rocky mountains. Why do they exist in this types of area?

This is because these species of butterflies has two variant of enzymes.which makes them well adapted to the varied range of temperature exposed to in this habitat, and therefore ensures their activity at wide temperature ranges.

Generally, rock mountains has wide range of temperature. Therefore the possession of variant of enzymes ensures sustainable of biochemical reactions for survival of  theses species because of the resistance of these enzymes to high varied  rocky temperature.

Explanation:

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

if you listed your answers right then i believe your answer is b.