Difference's in material's is what drives convection.

temperature and density

There are three types of heat transfer--radiation, conduction, and convection and the type where the heat is transferred and characterized by a circular movement of currents within a fluid is called convection.  Differences in material's temperature and density is what drives convection. Convection currents are formed by the heating and cooling of the fluid (temperature change),  changes in the fluid's density or mass, and the force of gravity combine to set the convection currents in motion.

the backbone of the dna and rna compound is sugar phosphate.

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation: