An asteroid that ... into the ocean can cause Tsunami.

Wavelength or width is the distance between one wave … to the next wave crest.

Tsunami is an abnormal sea waves that can do great ….

People go to … to board a boat.

Tsunami has the power to … coastal settlements.

The tremendous power of tsunami can cause … damage.

Coastal ... is in a great danger if tsunami occurs in the near by sea.

Children play happily on ... coastal water.

There are some factors causing sea …. One of them is wind.