Answer the following question given this paragraph: 

Spring tides occur during the new moon and full moon. The Sun and Moon must either be in a straight line on the same side of Earth, or they must be on opposite sides of Earth. Their gravitational pull combines to cause very high and very low tides. Spring tides have the greatest tidal range.


Q: What occurs during the new moon and full moon, due to gravitational pull?

 Choices:

- spring waves

- spring floods

- spring storms

- spring tides

A:
spring tides
