tides occur when the Sun, the moon, and Earth are nearly aligned. tides happen when the Sun and the moon are at right angles to each other. Each of these special tides happens in a lunar cycle.

The Sun, Moon, and Earth line up during spring tides, while the Sun and Moon are at right angles during neap tides. Each arrangement occurs twice during a lunar cycle, so the correct choice is “twice.”

AI-written and checked against the verified answer.