What type of development does Apex REST allow?

Apex REST allows for the creation of custom REST resources specifically tailored for business logic within Salesforce. This capability enables developers to expose Salesforce data and processes as RESTful web services. By using Apex REST, developers can define their own endpoints, handle incoming requests, and implement custom business logic that processes data in a way that suits their application's needs.

This is particularly beneficial for integrating Salesforce with external systems or for enabling third-party applications to interact with Salesforce data using standard web protocols. The customization offered through Apex REST allows for flexibility in how data is handled and ensures that bespoke business processes can be executed efficiently.

The other options focus on different aspects of integration and development that are not directly related to the capabilities provided by Apex REST. For instance, SOAP APIs are a different protocol that isn't utilized by Apex REST. Automated data synchronization tasks fall under data management techniques, which are separate from creating REST resources. Lastly, deploying third-party integrations generally involves broader strategies and platforms beyond just using Apex REST.