Which branch of science focuses on the study of plants?

The study of plants is specifically covered under the branch of science known as botany. Botany is dedicated to understanding the structure, function, growth, evolution, and taxonomy of plants. This includes not only flowering plants but also non-flowering plants such as ferns, mosses, and algae.

In contrast, biology is a broader field that encompasses all living organisms, including animals, fungi, and microorganisms, not just plants. Chemistry is the study of matter, its properties, and the changes it undergoes, which is not specific to the study of plants. Ecology, while related to plants in the sense that it examines ecosystems and interactions among organisms including plants, is focused on the relationships between organisms and their environment rather than the specific study of plants themselves. Therefore, botany is the most accurate and specific branch of science for the study of plants.