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.
A rhombus is a quadrilateral having four equal sides. It becomes a square when all its internal four angles are right angles. The rectangle like square also have all the angles as right angles.