None; sharks don't have bones, instead, they have strong cartilage, much like what our noses are made up of
Energy convention: Convection is the motion of a fluid driven by temperature differences across that fluid. When a fluid is heated, the region in closest contact with the heat source becomes less dense due to increased kinetic energy in the particles. Convection is one of the fundamental ways that heat is transferred
try it first then do it over again until it works
