What type of losses can often be controlled by the insured?

The correct answer is "Controllable Losses" because these are losses that the insured can actively manage or minimize through specific actions or behaviors. For instance, individuals and businesses can take steps to improve safety measures, implement risk management strategies, or maintain property to reduce the likelihood of certain risks materializing, such as theft or damage.

Controllable losses are closely associated with a policyholder's ability to influence their circumstances, such as by investing in security systems or adopting preventive maintenance programs. This proactive approach is key in reducing potential claims, lowering insurance premiums, and enhancing overall safety.

In contrast, options like Environmental Losses, Extra-hazardous Perils, and Nonaccidental Losses represent situations or risks that are not easily controllable by the insured. Environmental losses, such as those from natural disasters, are largely beyond the control of individuals and require external assistance. Extra-hazardous perils refer to inherently risky activities or scenarios, while nonaccidental losses may occur due to unforeseen circumstances or events that the insured cannot manage effectively. Thus, "Controllable Losses" stands out as the best choice as it highlights the capacities of the insured to manage their risk exposure actively.