Correct Answer: (a) Archaeology
Solution:Archaeology - The study of ancient civilizations and cultures by examining their sites.
Entomology - the branch of zoology concerned with the study of insects.
Etymology - the study of the origin of words and the way in which their meanings have changed throughout history.
Arachnology - Arachnology is the scientific study of arachnids, which comprise spiders and related animals such as scorpions, pseudoscorpions, and harvestmen.