Final answer:
In the Model-View-Controller paradigm, the Model manages the data and business logic. The Model in Salesforce development can be implemented using Standard Objects and Custom Objects.
Step-by-step explanation:
In the Model-View-Controller (MVC) paradigm, the Model is responsible for managing the data and business logic of the application. It represents the application's data and provides the necessary methods to access and manipulate that data. In terms of Salesforce development, the Model is often implemented using both Standard Objects and Custom Objects.
Standard Objects, such as Account or Opportunity, are pre-defined objects provided by Salesforce that store common types of data. Custom Objects, on the other hand, are created by developers to store specific types of data unique to the application.
Therefore, the correct options for the Model part in the Model-View-Controller paradigm would be 1) Standard Objects and 2) Custom Objects. The other options, Standard Pages and Visualforce Pages, are not part of the Model layer, but rather belong to the View layer in Salesforce development.