Answer:
artifacts
Explanation:
By examining various artifacts an archeologist studies the culture and lives of early humans. It is the study of human life throughout history and also the study of their way of life for example what they did for fun. They are different from paleontologists who study dinosaur bones.
Those who study rocks are called geologists
Historians study historical events.
Allowed troops and supplies (food, water, guns) to be going to Eastern Germany to fight before US got involved and was too much to handle <span />