The temperature of a body is a measure of the ______________ _________________________.

The temperature of a body is fundamentally related to the speed of vibration of its molecules. As the temperature of an object increases, the kinetic energy of its molecules also increases, leading to faster vibrations and more vigorous movement. This microscopic activity is directly correlated with temperature, meaning that higher temperatures correspond with greater molecular motion.

Understanding this concept is key in the study of thermodynamics and power engineering, as it provides insight into how energy transfers and heat exchange occur within systems. The other choices do not accurately convey this essential relationship: cohesion between molecules relates to the forces holding them together, the heat required to raise a body to its boiling point involves the energy input needed to change the phase of the material rather than its temperature per se, and total heat contained in the object refers to internal energy, which also incorporates other forms of energy, not just the kinetic aspect represented by temperature.