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Which decision is the BEST example of making a choice at the margin?
Plants
Multicellular organisms, primarily using photosynthesis for energy, characterized by green leaves and structural components like stems and roots.
Algae
Simple non-flowering plants, including seaweeds and many single-celled forms, that typically conduct photosynthesis within aquatic environments.
Stromatolites
Layered structures formed by the accumulation of sedimentary grains bound by biofilms of microorganisms, particularly cyanobacteria, dating back to the Precambrian era.
Zircons
Mineral crystals that can contain radioactive elements used for radiometric dating, providing insight into Earth's geologic history.
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