Discovering Early Human Tool-Making Techniques

Obsidian is a type of rock that was commonly used to make tools because it was readily available

Obsidian is a type of volcanic glass that was commonly used to make tools because it could be shaped easily and produced sharp edges (correct)

Obsidian is a type of wood that was commonly used to make tools because it was strong and durable

Obsidian is a type of metal that was easy to shape into tools

It suggests that early humans may have made sharp tools in a workshop to hunt animals (correct)

It confirms that early humans only used stone tools for cutting and piercing

It proves that Homo erectus was the only early human to possess body proportions similar to modern humans

It shows that early humans were not capable of intelligent planning and imagination

Homo sapiens

Homo neanderthalensis

Homo habilis

Homo erectus (correct)