Final answer:
Acheulean tool kits, known for their improved design and function compared to earlier Oldowan tools, are commonly found in Africa, Europe, and the Middle East, but are less common in other regions such as Asia due to different timelines of human migration and tool development.
Step-by-step explanation:
Acheulean tool kits are common in Africa, Europe, and the Middle East, but they are thought to be less common elsewhere. The development of Acheulean tools began around 1.7 million years ago, with hand-axes that were more refined compared to the earlier Oldowan tools. Such tools were characterized by their teardrop shape and were used for cutting, scraping, and chopping tasks. Homo ergaster is known for the first notable usage of these tools, which showed advanced motor skills and cognitive capabilities due to their symmetric bifacial construction. These tools, which constitute the Acheulean industry, were dominant until about 250,000 years ago, eventually giving way to Mousterian tools in Europe, North Africa, and southwestern Asia.