How do you say cuales caracteristicas forman las fronteras del pais in English?

The most natural translation of "cuales características forman las fronteras del país" is:

What features form the country's borders?

Here's a breakdown:

* "cuales características" translates to "What features"

* "forman" translates to "form"

* "las fronteras del país" translates to "the country's borders"

Let me know if you'd like other ways to express this!