The differential gravitational effects of the Moon and the Sun are what raise the tides in Earth's oceans, and such forces are often referred to as tidal forces.
(The differential gravitational effects of the Moon and the Sun; are; raise the tides in Earth's oceans) (such forces; are referred; as tidal forces; T:often)
The differential gravitational effects of the Moon and the Sun such forces
are are referred
raise the tides in Earth's oceans
as tidal forces T:often