Heat is a form of ______ and temperature is a _______ of the amount of heat energy in a body.
A) energy, measure
B) mass, measure
C) energy, instrument
D) mass, experiment

Hint: If we want to measure whether a body is cold or hot, we use a thermometer to measure the temperature. When a body is cold, then more heat is given to it, so as to increase its temperature.

Complete step by step answer:
We all know that there are different forms of energy available. One such form of energy is thermal energy. Thermal energy is a form of energy that can warm a particular body when thermal energy is given to it. Similarly, a body will get cold when thermal energy is taken away from it. Thermal energy is also referred to as heat energy.
Temperature tells us whether the body is warm or cold. Thus, it can be said to be a measure of a body being hot or cold.
If a body is given some amount of heat energy, then its temperature will rise accordingly, and similarly, if a body releases some amount of heat energy, its temperature will fall down. The direction of heat energy flow is always the same, which is from a higher temperature body to a body that is at a relatively lower temperature.

So, heat energy can be said as a form of energy while the temperature can be termed as a measure of heat energy. Thus, from the given set of options, option A is the correct one.

Note:
We all must not confuse it with the temperature being the same as heat. Both the terms are important in physics but are way different from each other. The more the temperature of a body, the more heat energy in it.