What are three ways in which early humans adapted to new environments during the stone age?

Well, they would create tools that were needed in that environment like in the desert you would need a spear maybe in the jungle you would need a sword... Also they adapted their bodies to fit the environment like getting used to the cold or heat.. Finally they adapted their skills like if you were in the snow you would build a igloo or if you were in the jungle you would build a jungle hut...