Final answer:
A semidiurnal tide pattern consists of 'Two high tides and two low tides each day', caused by the Earth rotating underneath the gravitationally induced tidal bulges of the Moon and Sun.
Step-by-step explanation:
The phrase that best describes a semidiurnal tide pattern is 'Two high tides and two low tides each day'. That pattern results from the gravitational pull of the Moon and the Sun on Earth's oceans and the rotation of Earth itself. As the Earth spins, any given point on its surface passes under the tidal bulges approximately every 12 hours. This rotation, combined with the gravitational effects of the Moon and, to a lesser extent, the Sun, causes the regular rise and fall of the sea level known as tides. Although the Moon orbits the Earth every 28 days, the Earth's rotation is the primary reason we experience two high and two low tides daily.