How do animals contribute to soil productivity? A)
soil tramping
B)
defecation
C)
plant consumption
D)
plant habitation
E)
all of the above

States might choose to cooperate at the regional or global level for all of the following reasons except (2 points) a.) to gain regional political influence b.) to engage in dispute resolution c.) to assure basic human rights d.) to encourage economic interaction e.) to increase national sovereignty