Veterans with health insurance may choose to use their private health insurance to supplement their VA benefits. Payments from private health insurance usually cover copay expenses for VA health care. Having private health insurance does not affect eligibility for VA health care.
If the shape is below another, then it is always the shape above it as well. So a rhombus is always a parallelogram, a square is always a rectangle, and always a parallelogram, and always a quadrilateral, etc. If I could draw the arrows in this reply it would look better.
Both shapes are quadrilaterals, meaning that they have 4 sides. A rhombus is an equilateral quadrilateral, meaning that it is a four sided shape with all sides congruent, or the same length. A square is an example of a rhombus. More commonly a rhombus looks like a square that is falling over.