Final answer:
The true statement regarding the overload principle is that the body adapts to the stresses placed on it, which is essential for effective strength training and muscle building.
Step-by-step explanation:
Regarding the overload principle, option (b) The body will adapt to the stresses placed on it is true. The overload principle states that for effective strength training, the intensity of the exercise must be continually increased. For instance, lifting the same amount of weight over time will not increase muscle size. To achieve greater results, the weights lifted must become heavier, leading muscles to adapt and necessitating even heavier loads for further muscle mass gains. However, it is important to avoid over-exercising, as this can lead to overuse injuries, distress, and other health issues.