Preposition of place.
A prepositions says something about the position noun.
ask 'where' to find it.
*the ring is in the box.

where is the ring?

in the box.

  

*the ring is above the box.
where is the ring?
above the box.
above =higher than.
the picture is above the fireplace.

*the ring is on the box.

the book lies on the table.

*the ring is below the box.

where is the ring?
below the box.
below = lower than

* the apples are below the bananas.

The garden is behind the house.
behin = at the back of.
she is hiding behin the curtain.
susan is standing behind jack.

*the boy fell against the wall.

against = touching or in contac with.

*she is leaning against the couch.

the boy fell beside the wall