What is that pitot-like device under the left wing of the Cessna 152? Source: tkaviation.net

I suspect it's related to the fuel system, but it's only found on the left wing (see the yellow circle, not the pitot-tube). I haven't been able to find the right keywords to find anything about it.

I'm hoping to know its function and how it does it.
It's the fuel tank vent. It prevents forming a vacuum in the gas tank as it's drained, which would prevent further fuel flow to the engine.