Which scenario describes a renewable resource being used for energy? A factory fuels its furnaces with coal.
A turbine creates electricity using a gasoline-powered motor.
A school heats its classrooms with a natural gas furnace.
A power company generates electricity using a river’s current.

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve