The study of plants
a. anatomy
b. botany
c. physiology
d. psychology

The correct answer is option B, that is, Botany.

Explanation:

The scientific study of plant life is termed as botany. It is a branch of biology that is also known as the plant sciences, plant biology, or phytology. Botany encompasses a huge array of scientific disciplines, which study algae, plants, and fungi comprising growth, composition, development, metabolism, diseases, reproduction, chemical characteristics, and evolutionary associations between the various groups.  

The study of plants had started with tribal lore that was used to determine medicinal, edible, and poisonous plants, making botany as one of the oldest sciences.  

c is the correct answer hope this !