Answer:
Allusion is the answer. It's mentioning the river and what it's known for but not telling you the name of the river.
B please let me know if I’m wrong :)
Answer:
For example, when A sees B drowning and fails to save him, A may be drinking, singing, whistling, or dancing while not saving B, but this is still classified as omission in the legal context (requiring a duty to act in order to convict) since these actions are not related to the result.
A moral story. hope thats what ur looking for.