Answer:
The invention of the steam engine and the construction of steel bridges to carry trains across various physical features led to ever-increasing demand for the materials and labor to build more trains and tracks
Explanation:
Chapter 11 AP HUG quiz. Thank me later.
Answer:
1.mesosphere is a coldest atmospheric layer surrounfing the earth
2.it become cloud enough to freeze water vapour
3.the ice cloud are blue white are caled noctilucent
Explanation:
Plain - flat or Rolling Land with few changes in elevation
