An election management body is a group of people who make sure that elections happen in a fair and organized way. You know how when you're playing a game, you need someone to make sure everyone follows the rules and nobody cheats? That's kind of what an election management body does.
When grown-ups want to elect someone to be their leader - like a president or a mayor - they have to follow a bunch of rules so that everyone gets a fair chance to vote. The election management body helps make those rules and makes sure that everyone follows them.
They also help set up polling places, where people go to vote. They make sure that these polling places have everything they need, like voting booths and ballot boxes. They also make sure that people who want to vote are registered ahead of time, so they don't have any trouble when they show up to vote.
On the big day when everyone goes to vote, the election management body is there to supervise everything. They make sure that everyone is following the rules and that nobody is doing anything wrong. They also count all the votes when it's over, to figure out who won the election.
Making sure that an election is fair is really important, because it means that the person who gets elected is the one who most people wanted to win. And that's why the election management body is really important too. Without them, an election might not be fair, and that would be bad for everyone.