What aspect of plants does plant morphology specifically study?

Plant morphology specifically studies the form and structure of plants, focusing on both their external features, such as leaves, stems, roots, flowers, and overall plant architecture, as well as their internal structure at a larger scale. This field examines how these forms are developed, why certain structures are present, and how they contribute to a plant's functionality and survival. By understanding plant morphology, scientists can identify species, analyze evolutionary relationships, and explore how different forms of plants adapt to their environments, though such adaptations fall more under the study of plant ecology. Thus, the emphasis on form and structure distinguishes plant morphology from the other fields mentioned in your choices.