What type of letter is written to inquire about a product or service?

An inquiry letter is specifically designed for the purpose of asking for information about a certain product or service. This type of correspondence is direct and formal, and it allows the sender to pose questions or request specific details that they need to make informed decisions. Inquiry letters are commonly used in business settings to explore potential purchases, gather data about services offered by a company, or understand the terms and conditions associated with a product.

In contrast, a claim letter focuses on expressing dissatisfaction or making a complaint about a product or service, while a job application letter aims to apply for employment and highlight an applicant's qualifications. A feasibility report is a document that assesses the practicality of a proposed project or initiative, rather than serving as a means of inquiry. These differences underscore the specificity of the inquiry letter in addressing questions and gathering information, which is why it is the correct choice for this scenario.