Answer: The tissue(s) that George destroyed was (were) probably the PHLOEM.
and the tissue that Goege left undisturbed was (were) the XYLEM.
A PHLOEM tissue is the vascular tissue in land plants primarily responsible for the distribution of sugars and nutrients manufactured in the shoot.
A XYLEM tissue is the vascular tissue in land plants primarily responsible for the distribution of water and minerals taken up by the roots; also the primary component of wood.
As can be deduced from both definitions, removal of the phloem will ultimately lead to the death of the plant because the phloem is primarily responsible for the distribution of sugars and nutrients manufactured in the shoot.