system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it easier for children to learn new languages over adults?
gpt
Brain plasticity.

Children's brains are more plastic than adult brains--meaning, it's easier for them to change, not that they're made out of plastic.

One of the benefits of this is that children are less set in their ways, and can learn new things more quickly. This makes sense; children spend their entire childhood learning the things they'll need for adulthood. Language is one of those things, and while a child is still in its language-learning phase, it's much easier for that child to pick up a new language than it would be for an adult to do so.