Need some basic definitions

Chat GPT strikes again!! (You are supposed to indicate when you use an LLM to generate an answer you know)

Enumerable is not a thing in this context. Its apparently a thing in LINQ, but the text provided is LLM hallucination.

The correct answer is that IEnumerable is an interface that represents a number of objects that can be iterated over. Its a base type for many other object types.
Both List and Collection are both also IEnumerable types.

If thats confusing, thing of it like classifying animals. Both a shark and a goldfish are ‘Fish’, its a simpler way to define them, with less clear characteristics, just like IEnumerable is a simple way to classify a List, Collection, Array, Dictionary, etc etc.