How could shifts in the physical environment have caused major changes in early civilizations (select 2)
a) build up of silt could have made rivers less salty increasing the supply of clean water
b) too much or too little rain may have ruined crops creating food shortages
c) long term farming could have improved the quality of soil increasing crop yields
d) earthquakes or eruping volcano's may have destroyed communities

april 18, 1775, hundreds of british troops marched from boston to nearby concord in order to seize an arms cache.a confrontation on the lexington town green started off the fighting, and soon the british were hastily retreating under intense fire.

on april 19, 1775, american militia gathered to stop a british company sent from boston to capture supplies allegedly amassed in lexington, massachusetts. the militia fled, and the british left after not finding the supplies.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.