What should be done to help protect the Yellow River's future? A. use water conservation methods and reduce pollution
B. build more dams to slow the river's journey to the sea
C. increase the use of irrigation canals and reservoirs
D. reduce the number of ships on the river

A

Explanation:

because pollution is now a global problem and this is the solution to preserve the Yellow River to the next generation

The factors that contributed to the outbreak of World War I

Explanation:

The reason for the outbreak of World War I was European countries as they began to form alliances with other countries after the assassination of the heir of Austria-Hungary Archduke Franz Ferdinand. Imperialism, Militarism, alliances, and Nationalism were the cause of the war. The growing desire and competition in Europe led to an increase in disputes that helped push them into WWI.

European nations suffered massive casualties in the wars because of advanced technology and weapons such as machines guns, submarines, planes, tanks, grenades, chemical weapons, etc.