Which types of heat transfer involve heat flow from hot objects to colder objects?

convection, conduction and radiation is the correct answer because heat flows from hot to cold. The heat flows from hot objects to cold objects whether the heat transfer is occurring by convection, conduction, or radiation.   Heat flows from warmer substances to cooler substances until they reach the same temperature.

answer; ///(b) it is composed of four protein chains and four heme groups;