Which of the following would be least likely to damage an ecosystem? Question 3 options:

1)

founding a new city and building houses there

2)

building a dam to generate electricity

3)

raising a type of livestock in a region where it is not native

4)

gathering food instead of cultivating the land for crops

Quick using the information in the graph, one might speculate that a) w.w.i created increased job opportunities in the u.s. b) the election of president hoover in 1936 caused unemployment to decline. c) the return of soldiers following w.w.ii caused unemployment to increase in the u.s. d) the new deal programs of president roosevelt created employment opportunities in the u.s.