At altitudes of 5500 m above sea level, the body has more difficulty functioning because there is less oxygen available to
breathe. The highest city in the world is Wenzhuan, in the
Himalayas, at an elevation of 5099 m above sea level. How does
your knowledge of the circulatory and respiratory systems help
you make a connection between these two facts?

Where’s the graph 0.0

The answer is c establishing proper sleep hygiene

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.