Explanation
An app on the AppExchange is a solution that the consultant can recommend to meet the requirement of creating a declaratively configured, public facing form that creates data in Salesforce. An app on the AppExchange is an application that provides additional features and solutions for Salesforce. There are many apps on the AppExchange that offer form building capabilities, such as creating web forms, surveys, or quizzes, and capturing data from them in Salesforce. The consultant can help the Admissions office choose an app that meets their needs and budget. Email-to-case, Process Builder, and Salesforce Files are not solutions that can create a declaratively configured, public facing form that creates data in Salesforce. References:
https://appexchange.salesforce.com/appxStore?type=App&keyword=form%20builder
https://trailhead.salesforce.com/en/content/learn/modules/appexchange_basics