The correct answer is internal. Thoughts and feelings that people either share with others or choose not to share with them are internal because they happen within your mind and body, not outside of it. So in Perry's case, what he is feeling towards horseback riding is also internal because he is not expressing that overtly.
The Ebers Papyrus, c. 1500 BCE, details the use of lint, animal grease, and honey as topical treatments for wounds. The lint provided its natural absorbency, the animal grease provided a barrier to environmental pathogens, and the honey served as an antibiotic agent.
