What is one major problem that has resulted from population growth in the 20th and 21st centuries?
A. Urban populations have fallen as people move to rural areas.
B. Many countries remain technologically underdeveloped.
C. Forced migrations have become more common than ever before.
D. Diseases can spread more easily because of urban overcrowding.

question 10: the answer is c, to their constituents address a problem.

question 11: i think it would be domestic bills, which deal with american issues only and public bills, which affect the whole nation.

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australian plates collided into eurasian plates, and the himalayas formed. the andes mountain range the himalayas and the islands of japan form differently. the andes mountain range formed at the convergent boundary of an oceanic plate and continental plate.