What food is Houston known for?

When discussing the vibrant city of Houston, Texas, it's inevitable to bring up its culinary scene. But, what exactly is Houston known for when it comes to food? Is it the delicious barbecue, perhaps? Or does the city's melting pot of cultures lead to a fusion of flavors that set it apart? Perhaps there's a certain dish or cuisine that Houstonians pride themselves on, and outsiders have come to admire. I'm curious, what is the defining food that Houston is renowned for?