What causes the aurora borealis or northern lights to occur?

-streams of charged particles from the sun mix with earth's atmosphere
-light from the moon reflects on earth's atmosphere
-charged particles from the sun reflect off of the ice at the poles
-none of the above

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.