Explain "API Security" in the context of Salesforce.

API Security in the context of Salesforce is fundamentally about ensuring that only authorized users and applications can access and manipulate Salesforce data through API endpoints. This involves implementing authentication and authorization protocols that verify the identity of the user or application making the requests. Through proper API security measures, Salesforce can safeguard sensitive data, prevent unauthorized actions, and maintain data integrity.

When a request is made to the Salesforce API, API Security checks the user's credentials and permissions before allowing access to the requested resources. This is crucial in a cloud environment where the exposure of APIs can lead to potential risks if not properly secured. Keeping API access restricted to authorized users helps prevent data breaches, loss of sensitive information, and compliance violations, making it a vital component of any secure Salesforce implementation.

Other options, while related to API functionalities, do not capture the essence of API Security. For instance, unrestricted access could lead to serious vulnerabilities and security issues. Managing timelines for API changes and limiting call volumes are important, but they don't specifically address the core focus of API Security, which is protecting access to data based on user authentication and authorization.