Drupal 10 introduced several important enhancements and modernizations in core, focusing on improving developer experience, site building, and front-end capabilities. One of the most significant updates is the replacement of CKEditor 4 with CKEditor 5 , which provides a modern editing experience and better extensibility.
Drupal 10 also includes the Starterkit theme generator , which replaces older base themes and allows developers to create custom themes more cleanly and maintainably. Additionally, improvements were made to Layout Builder , enhancing usability and flexibility for managing layouts without requiring custom code.
Drupal continues to support decoupled/Headless architectures using built-in APIs like JSON:API, and improvements in this area are reflected in Drupal 10’s capabilities.
The other options list features typically provided by contributed modules , not Drupal core. For example, Webforms, SEO tools, social sharing, and flags are not part of Drupal core and must be added separately.
Thus, option A correctly represents features and improvements included in Drupal 10 core.
