Which process causes the formation of underground tunnels and caverns? melting of glaciers exposure of coral reefs overflowing of rivers and lakes dissolution of limestone bedrock

How much of the united states’ electric generation comes from coal? a. about 25% b. about 50% c. about 75% d. about 90%

True or false.the baltic states have taken steps to diversify. or decrease the variety of their industries

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t.c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite.b) wegener's ideas did a better job of predicting the results of new observations and experiments.c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't.d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era,dead white european males cannot get a fair shake.e) wegener won the nobel prize.