The document discusses three levels of pitch in speech: 1) low, 2) standard, and 3) high. It describes rising intonation, which uses a standard initial pitch that rises to a high variable pitch, and is commonly used in yes/no questions. Falling intonation uses a standard initial pitch that falls to a low final pitch, and is used for short questions, negatives, and affirmatives. Examples of questions are provided to illustrate rising and falling intonation patterns.