Which process is most responsible for the biochemical diversity of plants,including those that produce compounds that humans use for spices?

Question

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Evolutionary arms races with herbivores have likely been the most important process driving biochemical diversity in plants. Plants have evolved a variety of chemical defenses to deter herbivores from eating them, including the production of compounds that humans use for spices. This type of co-evolution between plants and herbivores has likely played a major role in shaping the diversity of secondary metabolites found in plants.

Which Process Is Most Responsible for the Biochemical Diversity of Plants,including