Answer:
Because the moon is closer to Earth than the sun, that is to say, the gravitational pull of the moon is stronger than the gravitational pull of the sun affecting the tides more than the sun.
Step-by-step explanation:
The sun has a larger size than the moon and stronger gravitation. However, as it is farther from the Earth in comparison with the moon, the gravitational pull between the sun and our planet is weaker than the one between the moon and the Earth. Even though the moon is smaller, the gravitational pull is stronger because it is closer to Earth. As a result, the moon affects the tides more than the sun does.