You make the hole extra wide. You make it deeper than the ball of earth that comes with the tree. You need to insert the tree and then be able to cover it with six inches of dirt. You will have to dig a hole and experiment, since we don't know the size of your tree or the size of the root ball.
A tree.
tree
2-4 inches below surface, roots faced down
Plant an oak tree.
Yes
As it is a plant, the oak tree belongs to the Kingdom Plantae.
no some oak trees have flowers on them
All plant cells have cell walls, and all plants have plant cells, and an oak tree is a plant, so yes.
Yes it is.
Yes.
oak tree.
An oak tree needs water and sun, like any plant.