What advantage to the flower are colorful petals

The advantage of having colorful petals for flowers is the greater chances of being attracted by bees and other bugs. These bees would help in the pollination process. The brighter the flower is, the more attractive it would be. Also, the nectar that the bees get in the flowers serves as a reward for them.

Mantle convection is the process that drives plate tectonics. the theory of plate tectonics states that the crust is divided into plates that float on the semi molten mantle below. the circular motion of the magma as it slowly rises and falls or move though convection cells drags the plates along causing them to move. the heat source in the lamp would represent the earth's core. the core is the source of energy that drives convection in the mantle. the lava represents molten magma under the earth's surface. if the lava lamp had floating pieces they would move as the circular motion of the lava in the lamp as it rises and falls would move them along the surface. these floating pieces would represent pieces of the earth's crust. 

D. latin america followed by africa