They were called petroglyphs.
The answer is C, He developed the concept of interchangeable parts.
Grégoire Kayibanda was the first president
That person exhibits an internal locus of control
Answer:your answer is at the bottom
Explanation: Urbanization created problems such the growing sectionalism and hierarchal society, with their economic growth and dependence on wages and earnings from the industries. Many of those who wanted to enjoy the freedom and growing economy, were at a disadvantage from lack of a proper education and language barriers.