What applies to the effectiveness of the front and rear wheel brakes, especially at higher speeds?

At higher speeds, the effectiveness of the front brake is greater than that of the rear wheel brake. This is because when you brake, your weight shifts forward, increasing the load on the front wheel and its grip on the road. This allows the front brake to generate more stopping force without locking up. The rear wheel, meanwhile, has less weight on it, so its brake is less effective and more easily locked. That is why answer 1, stating that the front brake is more effective, is correct. Always prioritize smooth front brake use for effective and safe braking, especially at higher speeds.