Natural Science CLEP Prep Practice Exam

Bond is the correct answer because it refers to the electrostatic force of attraction between atoms or molecules, which holds them together and forms a stable chemical structure. Endothermic energy is a type of energy, not a force, and it is not directly related to molecule cohesion. Density is a measure of mass per unit volume, not a force of attraction. Cohesion refers to the force of attraction between molecules of the same substance, but it does not encompass all types of molecular bonds. Therefore, bond is the best option that describes the force of attraction between molecules.