Which statements describe the decline of sumer?

select all correct answers.

as the fields of sumer grew saltier, harvests became smaller.

the swamps bred insects that carried disease.

there was a lack of natural barriers that could discourage attack.

the needed canals became too costly to build.

What triggered the surge of conservative governments in central europe at the end of world war i? a. the disintegration of european families in the wake of urbanization. b. a worldwide revolutionary upsurge. c. the revival of the austrian-hungarian and ottoman empires. d. the british suppression of the indian nationalist movement. e. the killing of the tsar during the russian revolution?

Why does benjamin martin eventually join the continental army

Why did president johnson decide not to run for reelection in 1968?