The correct answer is: C. Study of Trees
Dendrology is the scientific study of trees, shrubs, and woody plants. It includes the study of their structure, growth, reproduction, ecology, and uses. Dendrologists use their knowledge of trees to help manage forests, protect endangered species, and educate the public about trees.
Option A is incorrect because botany is the scientific study of plants.
Option B is incorrect because lepidopterology is the scientific study of butterflies.
Option D is incorrect because dendrology is a specific field of study, not a catch-all term for the study of plants.