When a solid object is immersed in water, it experiences a loss in its apparent weight. This loss in weight is equal to the weight of the water that is displaced by the object.

Option 1: This option correctly states that the loss in weight is equal to the weight of the water displaced. The principle behind this is Archimedes` principle, which states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces. This buoyant force reduces the effective weight of the object, resulting in the loss of weight.

Option 2: This option suggests that the loss in weight is less than the weight of the water displaced. However, this is incorrect. The loss in weight is always equal to the weight of the water displaced.

Option 3: This option suggests that the loss in weight is greater than the weight of the water displaced. However, this is also incorrect. The loss in weight is equal to the weight of the water displaced, not greater.

Option 4: This option states that the loss in weight is not related to the weight of the water displaced. This is incorrect. The loss in weight is directly related to the weight of the water displaced.

Therefore, the correct answer is option