Final answer:
The spreading of infection in a salon can occur through improper waste disposal, poor hand hygiene, and reuse of disposable items, but not through the use of clean and sanitized tools.
Step-by-step explanation:
Spreading infection in a salon can be attributed to improper practices that allow pathogens to transfer between individuals or from surfaces to individuals. Such practices include improper disposal of waste, lack of proper hand hygiene, and reusing disposable items. In contrast, the option of using clean and sanitized tools does not contribute to the spread of infection but instead helps to prevent it.
Examples of how infections can spread include touching objects like doorknobs that have been contaminated by an infected person, or through direct contact such as shaking hands. Pathogens on surfaces can also be a mode of transmission, as seen with the fungus that causes athlete's foot in public showers. Therefore, maintaining high hygiene standards in environments like salons is critical to preventing infections.