Why are some tsunamis described as local?

Could someone . i have tried to solve myself but my calculation is off

What properties of a moving object are used in determining the object's energy of motion

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter