Agriculture refers to:

A. Science of gardening
B. Science of rearing silk worms
C. Science of cultural norms and trends
D. Science of farming 

🧠 Explanation:

Agriculture, the science of farming, involves cultivating crops and raising livestock to produce food, fiber, and other resources. It forms the backbone of global economies, ensuring food security and supporting rural communities. Techniques like irrigation, crop rotation, and fertilization enhance yields, while modern advancements, such as precision farming, improve efficiency. Agriculture also impacts environmental sustainability, requiring balance to prevent issues like soil degradation. Its study includes plant science, animal husbandry, and agronomy, making it a multidisciplinary field critical for human survival and economic stability, practiced worldwide with diverse methods suited to local climates and cultures.