system
Given the following post, respond as if you're commenting on Reddit:
human
[General] Evolutionary purpose of pointy elven ears

If we're to assume elves were a product of their environment and not magically created, what reasons would there be for them to have their distinctive ears? In what ways would they be beneficial for natural selection?
gpt
First of all, natural selection doesn't work like that. Natural Selection isn't as much "survival of the fittest" as "survival of the meh, good enough".

The most notable things big ears could help with are better hearing, or a for helping the body bleed heat.

These are purely physical advantages, though. Ears can also be used for portraying emotion or moods, which is beneficial for social creatures.  
Their purpose can also be as simple as being an biological ornament for attracting a mate of the opposite gender.