To answer this question, you need to understand the field of entomology.
Entomology is the scientific study of insects. It involves the study of their biology, behavior, classification, ecology, and interactions with other organisms.
Let's go through each option to understand why it is correct or incorrect:
Option A) Animals - This option is incorrect because entomology specifically focuses on the study of insects, which are a specific group of animals.
Option B) Mammals - This option is incorrect because entomology does not involve the study of mammals. Mammalogy is the specific field of study that focuses on mammals.
Option C) Reptiles - This option is incorrect because entomology does not involve the study of reptiles. Herpetology is the specific field of study that focuses on reptiles and amphibians.
Option D) Insects - This option is correct because entomology is the study of insects. Insects are a diverse and abundant group of invertebrates, which include species such as beetles, butterflies, ants, bees, and many others.
The correct answer is option D) Insects. This option is correct because entomology specifically deals with the study of insects.