If an animal comes and digs up the acorn seed before its roots develop the depth and stability needed, the Oak tree remains only "potential".
(an animal; comes; ) (an animal; digs up; the acorn seed; T:before its roots develop the depth and stability needed) (its roots; develop; the depth and stability) (the Oak tree; remains; only "potential)
an animal an animal its roots the Oak tree
comes digs up develop remains
the acorn seed T:before its roots develop the depth and stability needed
the depth and stability
only "potential