How did early humans survive their harsh environments?
A.
They lived in caves and rock shelters.
B.
They built walls around their homes for protection.
C.
They built homes out of stone.
D.
They built homes out of wood.
A.
They lived in caves and rock shelters.
B.
They built walls around their homes for protection.
C.
They built homes out of stone.
D.
They built homes out of wood.