Answer:
2.6 to 1.7 million years ago
Step-by-step explanation:
The Oldowan stone tool industry is associated with early hominins, specifically Homo habilis and possibly Australopithecus garhi. These early hominins lived approximately 2.6 to 1.7 million years ago and were the first to manufacture and use stone tools. The Oldowan tools are simple in design, consisting of flakes and cores, and were used for various purposes such as butchering meat, processing plants, and possibly even for defense.