Another crucial development was the use of a steel frame instead of stone or brick, otherwise the walls on the lower floors on a tall building would be too thick to be practical. ... Further developments led to the world's first skyscraper<span>, the ten-story Home Insurance Building in Chicago, </span>built<span> in 1884–1885.</span>
Answer:
climate cycles, solar variablity
Explanation:
The objective of the Congress was to provide a long-term peace plan for Europe by settling critical issues arising from the French Revolutionary Wars and the Napoleonic Wars. The goal was not simply to restore old boundaries but to resize the main powers so they could balance each other and remain at peace.
Answer:
before rescue breaths.
Explanation:
This is because you want to determine whether or not the patient is breathing and if not making sure you are looking in the patients mouth to see if a foregin body is blocking their airways