Final answer:
Wheezing is a whistling sound associated with diseased respiratory tissue, mucus, and pus.
Step-by-step explanation:
Wheezing is a whistling sound associated with all of the above options: diseased respiratory tissue, mucus, and pus. Diseased respiratory tissue, such as inflamed and constricted airways in conditions like asthma, can cause wheezing. The presence of excessive mucus and pus in the airways can also lead to wheezing.