Reducing the amount of loops will cause a loss of strength, as the loops make the magnet stronger.
It is B: ionosphere. This has the ability to bounce radio signals
We can feel it as heat, using the nerve endings in our skins.
Answer:
1/3 times.
Explanation:
Let V₀ be the peak voltage .
IR ( rms ) = ( V₀ / √2 R )
R is value of resistance
IC = ( V₀ ωC / √2 )
( 1 / ωC is reactance of capacitance in ac circuit )

= 
When frequency is tripled angular frequency will also be tripled
hence the ratio
becomes 1/3 times.
Since you didn't tell us the choices, I can pick anything I like.
The one that always does it for me is " foaming brine " .