How did stone tools change over time? why do you think these changes took play so slowy?

Because they bonded other materials to it

The first tools were sharpened stones. They later developed better tools such as the hand ax made out of flint. Later they also learned to attach wooden handles to tools. These changes took place slowly as the early humans found new purposes for their tools.

they have a third less land and than the rest of china

answer: the message or content is the information that the sender wants to relay to the receiver. additional subtext can be conveyed through body language and tone of voice. put all three elements together—sender, receiver, and message—and you have the communication process at its most basic.

explanation: