Which of the following is an example of a fungus?

Athlete's foot is an example of a fungus because it is caused by a type of fungi known as dermatophytes. These organisms thrive in warm, moist environments and are responsible for skin infections, particularly in the areas of the body where sweat accumulates, such as between the toes. The infection manifests as itching, redness, and peeling skin, making it a classic example of a fungal condition.

In contrast, pneumonia is primarily caused by bacteria or viruses, not fungi, and refers to an infection that inflames the air sacs in one or both lungs. Tuberculosis is a serious bacterial infection caused specifically by Mycobacterium tuberculosis, affecting the lungs and possibly other parts of the body. Herpes simplex refers to a viral infection caused by the herpes simplex virus, which leads to sores and blisters, commonly around the mouth or genitalia. Thus, the identification of Athlete's foot as a fungal infection highlights its distinct classification among the different types of pathogens.