Final answer:
The correct answer is C) It may cool or warm depending on the circumstances, as a body will exchange heat with its surroundings until thermal equilibrium is achieved, according to Newton's Law of Cooling and the zeroth law of thermodynamics.
Step-by-step explanation:
According to Newton's Law of Cooling, if a body with temperature T1 is placed in surroundings with temperature T0, the answer to whether it will always cool or warm is C) It may cool or warm depending on the circumstances. If the body's temperature is higher than the surrounding temperature (T1 > T0), it will cool down. Conversely, if the body's temperature is lower than the surroundings (T1 < T0), it will warm up. This process will continue until thermal equilibrium is reached, which is a fundamental concept of the zeroth law of thermodynamics.
This law implies that if two systems are in thermal equilibrium with a third, then they are also in equilibrium with each other. The law of cooling is an application of this principle, as it predicts the heat exchange between an object and its environment until they are in equilibrium, with no further temperature changes occurring once equilibrium is reached.