Which learning preference is defined by the use of external stimuli to facilitate learning?

The choice that correctly identifies the learning preference defined by the use of external stimuli to facilitate learning is observational learning. This type of learning occurs when individuals acquire new behaviors or information by watching others, often in real-life situations or through media. Observational learning emphasizes the role of external examples and stimuli, allowing individuals to learn through imitation or by observing the consequences of others' actions.

This concept highlights the importance of social interactions and environments in the learning process, as learners are influenced by the behaviors of role models or peers. Thus, it integrates external factors as a key component of how knowledge and skills can be developed.

The other options identify distinct learning processes that do not fundamentally prioritize external stimuli in the same way. For instance, experiential learning focuses on hands-on experiences and the reflection upon those experiences, while discovery learning emphasizes the learner's active involvement in exploring and finding solutions on their own. Structured learning is characterized by a more formal and organized method of instruction, which may or may not directly incorporate observation of others.