What must be included in each claim's structure according to its anatomy?

Each claim in a patent application must adhere to a specific structure to be deemed valid and enforceable. This required structure includes having a capitalized first word followed by the body of the claim. The capitalized first word indicates the type of claim—such as "A," "An," or "The"—which helps in defining the scope and nature of the invention claimed.

The body of the claim then follows, detailing the specific features of the invention, which includes elements that delineate what the claim covers. This format is essential for clarity and helps to ensure that the claims are accurately interpreted during examination and enforcement. By adhering to this structural requirement, the claims can be more easily understood by patent examiners and provide clear notice to others in the field about the scope of the patent rights being requested.

The other options presented do not align with the fundamental requirements of claim structure under patent law. Prior art references and comparisons with existing patents relate more to the patentability analysis and examination process rather than the claim's internal structure. Similarly, listing potential modifications and alternatives is not a structural requirement but may be more relevant in discussions of the invention's breadth or enablement. Thus, emphasizing the proper structure of claims with a capitalized first word followed by a body