A wave creates a strong undertow. what kind of wave is it?

a. tsunami

b. swell

c. long shore

d. deep water

The kind of wave that create a strong undertow is called a swell. The correct option is B. A swell is defined as a bunch of mechanical waves that are created along the interface between water and air. Swells need large body of water such as ocean to develop. Swell waves are essentially wind generated.