system
Given the following post, respond as if you're commenting on Reddit:
human
Why is string cheese stringy?
gpt
String cheese is basically a type of mozzarella cheese.

At the factory, when the curd is still hot and the machines (or workers) are manipulating the curd, instead of kneading the curd into itself to form a normal mozzarella ball, they stretch it and knead it into a stick lengthwise, gradually lengthening it over and over, creating many layers. The curd has to have the right moisture content to do this, too moist and it just melts together, too dry and it will not stick to itself even if you press it firmly.

When the curd has reached the correct consistency they stop and usually put it in a brine solution to absorb salt, then package it. 

When you peel the ends of the cheese, it will break off in strings because those are the layers that the cheese was folded into.