If the sun, earth, and the moon were all lined up as shown in the image below, there will be spring tides. This happens when there are very high tides and very low tides. This happens due to the gravity of the sun and the moon acting on the Earth’s ocean.
When the Sun, the Earth, and the moon all line up, the gravity of both the sun and moon combine together and it is effective enough to cause ocean tides. This effect is studied in geology, astronomy, or planetary sciences. Overall, it falls under the domain of natural sciences.