Answer:
It looks like children working in a coal mine so i guess Gases, Mines could collapse, and possibly get sick from fumes or something.
The correct answer is Feathers and Bones
Answer:
<em>There </em><em>are</em><em> two types of steamboats: an East Coast type and a Western Rivers type.</em><em> </em><em>The</em><em> </em><em>first</em><em> </em><em>steamboat</em><em> </em><em>was</em><em> </em><em>invented</em><em> </em><em>by</em><em> </em><em>an</em><em> </em><em>American</em><em> </em><em>inventor</em><em> </em><em>named</em><em> </em><em>Robert</em><em> </em><em>Fulton</em><em> </em><em>in</em><em> </em><em>180</em><em>7</em><em>.</em><em> </em><em>I</em><em>t</em><em> </em><em>was</em><em> </em><em>called</em><em> </em><em>the</em><em> </em><em>Clermont</em><em>.</em>
Cuneiform was used a lot for keeping records of business deals. It was one of the earliest writing systems that we know of. Cuneiform literally means wedge-shaped which is how they wrote. It was used around 3500-3000 B.C.
Hope this helps!