What is the primary focus of Entomology?

Entomology is primarily concerned with the study of insects. This branch of science encompasses a wide array of topics related to insects, including their biology, behavior, ecology, taxonomy, physiology, and their interactions with humans, other organisms, and the environment. Insects are the most diverse group of animals on Earth, and understanding them is crucial for various applications such as agriculture, pest management, disease control, and biodiversity conservation.

In contrast, the other choices focus on different areas of study. The study of plants pertains to botany, while the study of animal behavior falls under ethology. Soil quality is a topic most closely related to soil science or agronomy, rather than entomology. Thus, the emphasis on insects in entomology distinctly sets it apart in the realm of biological sciences.