Question 1:
False
Pitch is related to frequency, not loudness. Loudness is related to amplitude.
Question 2:
True
Pitch is indeed related to frequency.
Question 3:
The pitch goes up.
As frequency increases, the pitch goes up.
Question 4:
True
The closer together the waves are, the higher the pitch.
Question 5:
closer together.
As an object moves towards you, the wavelengths are compressed, making them closer together.