Which statements describe the decline of sumer? choose all answers that are correct.
a. the swamps bred insects that carried disease.
b. the needed canals became too costly to build.
c. there was a lack of natural barriers that could discourage attack.
d. as the fields of sumer grew saltier, harvests became smaller.

Which of the following scenarios best shows the relationship between personal and civic responsibility? tara stays home on friday night to babysit her sister instead of going to a movie with her friends. theo asks neighbors to sign a petition asking the city council to lower the speed limit in their neighborhood to make it safer for children. natalie watches a presidential debate with her parents in order to complete a homework assignment for school. nick’s scout troop adopts a section of highway in their community to keep free from litter.