Correct: The answer is a. During the Paleolithic era, a people living in what is now Egypt used a form of iron as part of their tools, along with stone, bone, and wood.
Incorrect: The answer is a. During the Paleolithic era, a people living in what is now Egypt used a form of iron as part of their tools, along with stone, bone, and wood.
4. When did humans first begin to use iron?