You might have heard the name 'Houthis' in the news lately. They are a group of fighters based in a country called Yemen. For a long time, they were just a small group living in the mountains. Now, they have become a major force that is worrying countries all over the world.

**Who are the Houthis?**
The Houthis are a group that follows a specific branch of Islam. They started as a local movement in Yemen. Over the years, they grew much stronger. Today, they are backed by Iran. Iran provides them with weapons, training, and support.

**Why are they fighting?**
In Yemen, there has been a very long and sad war. The Houthis have been fighting against the government of Yemen and a group of other countries led by Saudi Arabia. This war has caused a lot of suffering for the people living there.

**Why is everyone worried now?**
Recently, the Houthis started attacking ships in the Red Sea. The Red Sea is a very important path for big boats that carry oil, food, and other things we buy. When the Houthis attack these ships, it makes it dangerous for companies to move goods around the world. This can make the price of things like gas and groceries go up for everyone.

**How did they get so strong?**
Many experts say the Houthis have changed a lot. They went from being a small group to having powerful missiles and drones (those are like small, flying robots that can drop bombs). Because Iran helps them, they have better technology than they used to.

**What happens next?**
There is no easy answer. Countries like the United States and Saudi Arabia are trying to figure out how to stop the attacks without starting a bigger war. Because the Houthis are so involved in the region, every move countries make could have a big effect on global oil prices and safety at sea.

In short: A small group has grown very strong with help from Iran. They are now using that power to disrupt trade and fight in a regional war, which is making life harder and more expensive for people far outside of Yemen.

Source: The New York Times