Answer: The correct answer is Option b.
Step-by-step explanation:
From the given options:
Option a: Neap tides
Neap tides occurs when Sun and Moon form right angles with Earth. The total gravitational pull is weakened because it acts from two different directions. These tides occur twice a month. These tides have lower high tides and higher low tides.
Option b: Semidiurnal tides
These tides occur when two highs and two lows are of the same height. This pattern is known as semi-daily or semidiurnal tide. They show the same pattern throughout the day.
Option d: Spring tides
Spring tides happens when Sun, Moon and Earth, all align in the same line. The gravitational pull of Sun and Moon, both contribute to the occurrence of these tides. Hence, these tides have higher high tides and lower low tides.
From the above information, the correct answer is Option b.