It benefits companies by letting geologists find out where oil would likely be by studying surface rock formations, magnetic fields and even slight variations in gravity. One of the most important innovations in oil exploration was 3-D seismic imaging. The companies end up making tones of money off the research that they find
B. He conquered the last of the Song Dynasty and brought China under Mongol rule.
Explanation:
Kublai Khan is one of the best known Mongol rulers, both for good and for bad. He was the grandson of Genghis Khan, and unlike his grandfather and father, he ruled in a manner that promoted tolerance among the different groups of people. One of the things by which Kublai Khan is best known is that he was the first Mongol to conquer and rule all of China.
Kublai Khan managed to conquer the last independent Chinese state, the Song Dynasty, incorporated it into the Mongol Empire, and formed the Yuan Dynasty. While this was seen as a great success and promised a long lasting and powerful empire, Kublai Khan also made some mistakes (mostly military ones) that actually started off the decline of the empire.
Secondary sources draw on primary sources. They may comment on primary sources, or use the evidence from primary sources to construct an argument. Books or journal articles that analyze, critique, or synthesize a range of sources are examples of secondary sources.
Brick
Straw
They began trade with other people to create money and get new crops
