Uniformly around the globe. it is mostly found in earths atmosphere.
<span>The word is "pitch", which is exactly that: How "high" or "low" a sound is.</span>
Choices 'C' and 'D' are both correct.
(Except in 'C', changing the temperature from 1°C to 3°C is not usually
described as 'cooling', and it's not the water's 'mass' that changes. But
water does contract in volume during that change.)
