What are the key differences between a crumble, a crisp, and a cobbler dessert?

The key differences between a crumble, a crisp, and a cobbler dessert lie in their toppings. A crumble has a streusel-like topping made of flour, butter, and sugar. A crisp has a similar topping but includes oats for added texture. A cobbler, on the other hand, has a biscuit-like topping that is dropped onto the fruit filling.