Which statement accurately describes the origin and expansion of the universe?

According to Big Bang model, the origin of the universe starts about 13.8 billion years ago.

'' The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time''. Edwin Hubble, an astronomer in 1929 who discovered that the universe is not static it is expanding at regular interval.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.