Which type of line connects a dimension to a specific feature in a technical drawing?

The correct choice is the leader line. A leader line is specifically designed to connect a specific feature on a technical drawing to its corresponding dimension or annotation. This type of line is often used to clarify the measurement or detail being referred to, especially when the dimension cannot be placed directly adjacent to the feature due to space constraints or other design considerations.

Leader lines typically have an arrow at one end that points precisely to the feature and may include a straight or curved portion that leads to the dimension text. This visual connection helps in accurately associating the dimension with the feature in question, which is essential for effective communication in technical drawings.

Dimension lines, on the other hand, indicate the extent or size of a physical feature and are usually accompanied by numerical values, but they do not connect to specific features in the same way leader lines do. Reference lines are used for guiding or illustrating relationships but do not specifically connect dimensions to features. Finally, center lines denote the centers of circles or symmetrical objects, serving a different purpose.