The correct answer is 3) scientist who studies materials from the past to learn about ancient peoples.
The correct definition of an archeologist is a scientist who studies materials from the past to learn about ancient peoples.
An archeologist dedicates its life to study ancient places and exploring ancient civilizations or ruins to learn more about our past, the way people lived and prospered thousands of years ago and how those ancient civilizations influenced modern cultures. Without their work, we wouldn't be able to admire wonderful archeological sites such as Giza in Egypt, Teotihuacan in Mexico, or Machu Pichu in Peru.