I believe the answer is d
<h2>
Answer:</h2>
<em>I would say the best answer is option three.</em>
<h2>
Explanation:</h2>
A functional text is a text to fulfill a certain function, such as instruction manual or description of getting somewhere. A dialogue would be too confusing and redundant for this purpose; the best functional text would simply describe the information it needs to provide in a clear manner.
If the frequency of the sound is increased then the pitch will also increase.
