Question

When the tides are especially strong due to the alignment of the sun and moon, it is called a _____ tide?

Answer 1

When the tides are especially strong due to the alignment of the sun and moon, it is called a spring tide. 

Answer 2

Spring tides

Step-by-step explanation:

Tides are rise and fall of sea level from the normal level due to gravitational pull of sun and moon.

Spring tides occur when the effect of gravity is maximum as sun and moon align in single line. This happens during new moon and full moon. The tidal range is maximum i.e. highest high tides and lowest low tides occur.