Answer
Pigments such as chlorophyll are needed because they capture light energy to be used for photosynthesis.
Work Step by Step
Pigments such as chlorophyll absorb certain wavelengths of light. There are two forms of chlorophyll used by plants: chlorophyll a and chlorophyll b. These two types absorb light well within the blue-violet and red portions of the visible spectrum but do not absorb light in the green part of the spectrum; therefore, chlorophyll gives plants their green color because chlorophyll reflects green light.
