Which of the following pathogens typically causes infections on the surface of the skin and nails, such as athlete's foot?
a. bacteria
b. fungi
c. parasitic worms
d. virus

"Athlete's foot" is actually a name of a disease, and it's caused by a fungi- so the correct answer is B. It can be caught in places in which people who have it are barefoot and other people are barefoot too- such as in communal showers (which is why athletes often get it)

Ithink the answer is 1. warmth

Dropping a dry bar of soap on the ground won’t clean it, by it will pick up germs from the ground so the soap would be dirty