I got ocean->radio

My path:

Ocean-> waves -> amplitude -> radio

Solution path:

Ocean -> air —> radio

It seems odd that waves could be less closely related to radio than air.

I wonder if there’s some homonym issue with wave or something like that?

Edit:

Similarly, I got a random puzzle:

Heat -> Bar

“Pressure” seams like it ought to be a good guess. But apparently Heat and pressure are 29% related (ok! Seems reasonable). But bar and pressure are only 7% related despite a bar being a unit of pressure.

The solution was to add kilobar between bar and pressure, which is fine I guess.