D. the sinking of the British ocean liner, <em>Lusitania.</em>
When a German U-boat (submarine) sank the <em>Lusitania </em>in May, 1915, over 1,000 persons were killed, including more than 100 Americans. The passenger liner was targeted by the Germans because they suspected weapons were being shipped to Britain in the cargo hold of the ship.
As an example of American feeling after the <em>Lusitania </em>incident, consider the reaction of Gifford Pinchot. He had been the Chief of the US Forestry Service (from 1905 to 1910) , and was quoted in the New York Times in May, 1915, after he had just recently returned from Europe. He asserted that Americans on the<em> Lusitania</em> (along with other passengers) were killed because an autocratic military empire was trying to dominate nations that were self-governing. His characterization of German intentions would mirror how President Woodrow Wilson later called on the USA to enter the war to "make the world safe for democracy."
Answer:
The global food system is facing daunting and complex challenges in ... Three key challenges facing agriculture and how to start solving them ... that will likely grow from 7.5 billion people today, to nearly 10 billion by 2050.
Explanation:
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period of time. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountain or polar areas. At lower latitudes and altitudes, these glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In areas of limestone bedrock, dry valleys may also result from drainage taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valley are described by geographers, using terms that may be global in use or else applied only locally.