Drawbacks to which energy source include build up of silt or disruption of salmon migration?
Nuclear energy
Geothermal energy
Photovoltaic cells
Hydroelectric power

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !

well its is frequent rain

have a good day

answer; the edward snowden leaks of nsa classified material;