Final answer:
Early stone tools were developed about 2.6 million years ago by Homo habilis and were called Oldowan tools. They were used for cutting, scraping, and chopping.
Step-by-step explanation:
The text mentions that early stone tools were developed about 2.6 million years ago. These stone tools were likely created by Homo habilis by smashing rocks together to create sharpened edges. These tools, known as Oldowan tools, were used for various purposes such as cutting, scraping, and chopping.