The type of tide that occurs when the Sun, Earth, and Moon line up together is called a spring tide.

Here's why:

* Gravitational pull: The Moon's gravity has the strongest influence on tides, but the Sun also exerts a gravitational pull on Earth.

* Alignment: When the Sun, Earth, and Moon are aligned (either during a new moon or full moon), their gravitational forces combine, creating a stronger pull on Earth's oceans.

* Higher highs, lower lows: This combined pull results in higher high tides (spring high tides) and lower low tides (spring low tides).

Let me know if you have any other questions about tides!