Final answer:
Archaeologists have proposed different cultural practices and tool-making traditions to explain the absence of hand axes in Homo erectus remains on the eastern side of the Movius Line.
Step-by-step explanation:
Archaeologists have explained the absence of hand axes in Homo erectus remains on the eastern side of the Movius Line by proposing different cultural practices and tool-making traditions. Hand axes are a type of stone tool associated with the Acheulean industry, which was primarily found in Africa, Europe, and the Middle East. It is possible that Homo erectus populations in eastern Asia developed their own unique tool-making techniques and did not adopt the use of hand axes. These alternative tool-making traditions could have been influenced by factors such as different environmental conditions, cultural interactions, or technological choices.