I don't think there are "the" 4 causes, as in 4 causes widely agreed to be the most important: there were many more causes. But here are 4 causes that I find important:
-political importance and prestige: countries wanted to be better than other countries...
-economical: countries sought wealth, for example natural resouces
-religious: countries sought favors with the pope by converting the "pagans"
- curiousity in the Age of Exploration: the will to discover our planet
A current that runs parallel to the beach in the area where waves break is known as a longshore current. When waves hit a beach at an angle, longshore currents form. Longshore drift is the term for the transfer of silt by longshore currents.
Longshore drift is the flow of sediments along a coastline caused by waves that come in at an angle to the shore before reversing course and moving straight away. In a "sheet-like" arrangement, water in a longshore current moves up the beach before returning to the ocean. This sheet of water can carry beach sand back out to sea as it passes over and off the beach. As the longshore current sweeps down current, floating objects move up and down the beach in a zigzag manner.
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Richard Nixon because of the Watergate scandal in 1972
Answer:
measles b/c heart disease can occur after long years of measles
