Find out which of the figures can be formed from the pieces given in the first figure $(X)$.

Let's analyze the components inside box $(X)$:
* There are $4$ separate triangular components inside the square frame.
* Specifically, they comprise two large right-angled triangles and two smaller right-angled triangles.

When we assemble these specific pieces together inside a single square frame:

* Bringing the large and small triangles together symmetrically by their hypotenuses creates a fully divided square with both diagonals complete.
* Figure (A) represents a square completely intersected by its two diagonals, containing exactly the 4 triangles from figure $(X)$ arranged tightly to fill the square.