During photosynthesis, plants take in carbon dioxide and release oxygen. During respiration, animals take in oxygen and release carbon dioxide. This is a cycle because: events can be predicted
plants and animals depend on each other
it happens in nature
it happens everywhere on earth

Read the excerpt from the travels of marco polo and study the map. when the traveler leaves kuh-banan he goes for fully eight days through a desert. . after these eight days he reaches a province called tun and kain, where there are cities and towns in plenty. it is situated on the northern borders of persia. there is an immense plain here, in which stands the solitary tree, which the christians call the dry tree. based on the excerpt and the map, what makes the journey to kain difficult? the kais sea travel through shiraz mountains and dry conditions the dry tree plains

Pls, i really need on this question?

Armed with invisible ink, a cipher system, and a passion to end the war and preserve the union, elizabeth van lew became butler's eyes and ears in the confederate capital city. truth be told, however, she became much more than that. she became a spymaster, the person responsible for running a network of agents, couriers, and safe houses that was very active during the war. in addition to the spying, elizabeth van lew continued to maintain her church hill home as a safe house and something of a local union spy headquarters. —the dark game, paul janeczko what is the central idea of this passage? van lew’s home was used as a safe house, which was critical to the confederacy. van lew had a passion to end the war and preserve the union. van lew was a spymaster, a leading force in the espionage activities for the union. van lew did not enjoy working for general butler.