Which is the most common tidal pattern?​

Correct option is D

·        Tidal patterns are caused by the Moon's gravity pulling on Earth's water, creating bulges that align with the Moon. 

·        The difference between the ocean level at high tide and low tide is called the tidal range. 

·        The tidal range depends on several factors, including the slope of the seafloor. 

·        Tidal patterns can change over time. For example, a tide may be semi-diurnal for a few days, then change to a mixed tide, and eventually return to a semi-diurnal cycle.

Tidal patterns vary by location and are characterized by the number of high and low tides that occur each day: 

• Diurnal tide

One high and one low tide each day. This pattern is common in partially enclosed basins, such as the Gulf of Mexico. 

• Semidiurnal tide

Two high and two low tides of approximately equal size each day. This pattern is common along much of the east coast of North America. 

• Mixed semidiurnal tide

Two high and two low tides of different size each day. This pattern is common along the western coast of North America.