Which statement best describes the relationship between FAA and GFAA?

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In atomic absorption spectroscopy, how the sample is atomized defines the relationship between these two techniques. One method uses a flame to atomize the sample: the material is drawn into a flame where it is heated and broken down into free atoms, and the absorption of light by those atoms is measured. The other method uses a graphite furnace, where a small sample is placed in a tiny graphite tube and heated in a carefully controlled program to very high temperatures to produce atomization in a short burst. This difference—flame atomization versus graphite furnace atomization—is what distinguishes the two. The other statements don’t fit because they imply both use the same atomization method or that neither does atomization, which isn’t correct.