In two to three sentences, summarize how america has changed as a result of the immigration act of 1965

aging population

immigration patterns

growing diversity

migration patterns

family structure

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44