Universal Containers (UC) uses a custom Lightning component with an Apex class to display shipment...

The custom Apex layer is responsible for enforcing Salesforce security; the Lightning component does not automatically make server-side data access safe. The valid runtime control among the choices is the Apex security mechanism that checks or enforces the user ' s access before data is returned or changed. Field-Level Security must be respected for sensitive values such as Shipment Amount, and the record-sharing model must also be enforced so a Private OWD is not bypassed. Schema Describe checks such as isAccessible(), isCreateable(), and isUpdateable() can be used for explicit field and object permission checks. Current secure-Apex patterns also include user-mode database operations and Security.stripInaccessible(), which can enforce or sanitize CRUD/FLS more comprehensively. Record visibility is a separate layer and should be preserved with the appropriate sharing context. System.runAs() is a testing facility, not a production authorization mechanism, and isShareable is not a valid Apex security keyword. Study Guide reference: Permissions to Standard Objects, Custom Objects, and Fields - secure Apex, CRUD/FLS, record-sharing enforcement, user-mode operations, and Lightning/Apex security boundaries.