What caused the collapse of the Sinhalese irrigation system in Ceylon between 1250-1400?

What will be an ideal response?


ANSWER:
Invasion from south India and spread of malaria.

History

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Women labor activists supported the Democratic Party in the 1960 elections, largely through the

A) AFL-CIO. B) church networks formed in the 1950s. C) Communist Party. D) assistance of male coworkers.

History

Much of the territory added to the Russian empire during the 17th and 18th centuries was

A) Balkan B) African C) Asian D) Polynesian

History

In December 1830, Lord Palmerston, the British foreign minister, persuaded representatives of the powers in London to recognize ___________ as an independent and neutral state

Fill in the blank(s) with correct word

History

As agriculture became more mechanized, men and women migrated from rural areas to ________

Fill in the blank(s) with correct word

History