Plants store the carbon they take in during photosynthesis mainly in their structures, such as leaves and stems. Though they absorb carbon dioxide from the air, the transformation into organic matter occurs within the plant's structure. This stored carbon is vital for the plant's growth and development. ;
During photosynthesis, plants store carbon primarily in their structures, such as leaves, stems, and roots, after absorbing carbon dioxide from the air. The carbon is transformed into organic materials that support the plant's growth. Therefore, the correct answer is b. plant structures.
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