Final answer:
Hardware and software failures preventing website sales represent an Availability risk, as they impact the ability of the system to be accessible and operational for transactions.
Step-by-step explanation:
When a company sells items over the Internet, there are many IT risks involved. The specific risk of hardware and software failures that prevent website sales would be classified as an Availability risk. This type of risk relates to the systems being accessible and functional whenever needed. If a company's website goes down, potential customers cannot complete their purchases, leading to revenue loss and possibly reputational damage.
Consider other risks such as Security risk, pertaining to protecting data against unauthorized access; Confidentiality risk, related to protecting sensitive information from being disclosed to unauthorized parties; and Processing integrity risk, in respect to accurate, complete, and valid data processing.