Final answer:
Someone who is sitting quietly and calmly on a bench could be described as serene, motionless, and calm, possibly with a repressed emotion and an air of introspection or peaceful stillness.
Step-by-step explanation:
If a person is sitting quietly and calmly on a bench in the park, someone could describe the person in a number of ways based on their appearance and demeanor. From the given passages, such descriptions might include being serene, motionless, displaying a calm face with a glance that does not reflect immediate thought or reflection but rather a suspension of intelligent thought. The person might be described as exhibiting a repression of emotion, suggesting a certain inner strength. A sense of stillness or lack of active engagement with their surroundings is also implied, as if absorbed in peaceful or introspective thoughts or perhaps overcome with a certain emotion that leaves them quiet and still.