I think it #3(not Sure) I think Its because of their long wavelengths that tsunamis behave as shallow-water waves.
Answer:
The frequency of radiation is 
Explanation:
Given:
Wavelength
m
Speed of light

For finding the frequency of radiation,




Therefore, the frequency of radiation is 
You can accelerate by changing direction, even though you don't speed up/down. Remember that acceleration is a vector so, it has a direction and a magnitude. That's why this works! Hope it helps.
In a person's forties, they are in the middle of stagnation vs. identity, so they are having an identity crisis.