Correct Answer:
C. Agronomy
The study of agriculture is known as Agronomy. This scientific field focuses on the production and use of plants for food, fuel, fiber, and land reclamation, encompassing soil management, crop production, and farming practices. Agronomy integrates principles from various sciences to improve agricultural efficiency and sustainability. Option A, 'Entomology', is the study of insects. Option B, 'Botany', is the broader scientific study of plants, but agronomy specifically applies plant science to agriculture. Option D, 'Zoology', is the scientific study of animals.