The foghorn blast from a big ship is a very loud sound . What is the best example of a very high pitched sound

Whistle

Explanation:

High pitched sound is a type of sound that has a high-frequency sound wave or outstanding pitch than other sounds in the area of observation.

There are various examples of high pitch sound, some of them include:

Nails scratching on the blackboard, School bell, Rubber shoes squeaking against a basketball court, Fireworks.

The most common high pitch sound and usually the best example is WHISTLE.

c. magnitude and direction

option number c is the right answer.