Which are renewable energy resources?
a) biomass
b) fossil fuels
c) geothermal
d) hydroelectric
e) petroleum
f) solar wind
~can be more than one answer.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.