Among the choices, literature:history is the likely answer. It is the only one that is not qualified to belong to the groups of words.
words:etymology - etymology is the study of the origin of words and how its meaning has developed through the history of time.
life:biology - biology is the study of life and living organisms. from its origin through its structure, function, growth, evolution, distribution, and taxonomy.
insects:entomology - entomology is the scientific study of insects.
humans:anthropology - anthropology is the scientific study of humans. its origin, its behavior, and its physical, cultural, and social development.