Which activity follows up on applications for claims?

The correct choice regarding which activity follows up on applications for claims is Development. This phase involves gathering additional information or evidence that may be necessary to substantiate a veteran's claim. Once a claim is submitted, it often requires further verification or clarification to ensure that all relevant facts are considered, which is what the Development phase focuses on.

During Development, the claims examiner assesses the initial application and determines whether it needs more documentation, such as medical records or service history, to make an informed decision. This process is crucial as it significantly affects the outcome of the claim by ensuring that all pertinent details are carefully evaluated.

In contrast, activities like Intake Processing Centers are primarily focused on the initial submission of claims, while Rating refers to the determination of a claim's validity and the assessment of the benefits to be awarded. Public Contact generally involves communication with claimants regarding their claims status or to answer queries, but does not specifically address the follow-up and investigation into claims applications.