Brain-imaging research shows that even simple mental operations depend on a the use of ten percent of our brain.
O b. the use of one specialized region of the brain.
b
O c. the use of only one brain hemisphere at a time.
O d. activity spread across multiple brain areas.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?