Which describes how a turbine works to produce energy for electricity? a. the spinning turbine produces heat energy that drives the generator to make electricity. b. energy from sources such as geothermal or from solar is used to spin the blades of the turbine. the turbine then powers a generator, which produces electricity. c. the turbine collects solar energy that it feeds to the generator to make electricity. d. the turbine drives heat energy from geothermal sources underground to the generator to make electricity.

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?