Good morning Chris;
I was very late getting to bed (after midnight) which is not beneficial to me. I am not a night owl at all. This morning, I checked two of my books :
1. The COE (1990) shows:
pitch - that "quality of a sound" which is governed by the rate of vibrations producing it.
(At least this agrees with my post 25 )
2. Westrup and Harrison's Music Encyclopedia (1959) shows:
pitch - the relative height or depth of a sound determined by the rate of vibration of the medium.
One of the definitions of "Depth" is shown as "intensity" so I think we can forgive the setter, maybe ?
I am now off for some much-needed sunshine, walking a friend's labrador and generally getting up to mischief. Have a good day. Jg