Option 1: This option suggests that the weight of the water displaced by the boat is less than the weight of the boat. However, this is incorrect. According to Archimedes` principle, the weight of the water displaced by a floating object is equal to the weight of the object itself. Therefore, option 1 is not correct.
Option 2: This option suggests that the weight of the water displaced by the boat is more than the weight of the boat. However, this is also incorrect. As mentioned earlier, the weight of the water displaced by a floating object is equal to the weight of the object itself. Thus, option 2 is not correct.
Option 3: This option suggests that the weight of the water displaced by the boat is equal to the weight of the part of the boat below the water level. This is partly correct. The weight of the water displaced by the boat is equal to the weight of the part of the boat below the water level. However, since the boat is floating, the weight of the water displaced is also equal to the weight of the entire boat. Therefore, option 3 is not the complete and correct answer.
Option 4: This option states that the weight of the water displaced by the boat is equal to