Ihigh of the following did the us government attempt to do during world war 1
a return the nation to a policy of neutrality
b increase public sympathy for the germanys
c raises the level of participation in elections
d convince people to the conserve resources

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of