Final answer:
The early tools used by Homo erectus were Oldowan tools created by Homo habilis. They later used more complex tools known as the Acheulean industry. Additionally, Homo heidelbergensis is believed to have used spears.
Step-by-step explanation:
The earliest known tools used by Homo erectus were likely created by Homo habilis and are referred to as Oldowan tools. These tools were made by smashing rocks together to create sharpened edges. They were used for cutting, scraping, and chopping tasks such as killing animals and butchering meat.
Later, Homo erectus began using more complex tools known as the Acheulean industry. These tools, including hand axes, cleavers, and side scrapers, were used for hunting, chopping wood, and scraping hides for clothing.
Homo heidelbergensis, a later ancestor of Homo erectus, is believed to have used spears that were hafted with stone points on wooden handles.