This produces a waxy covering that protects the plant from insects, bacteria, and fungi.

The correct answer is dermal tissue.  

The protection of the delicate tissues of the plants and monitoring the associations of the plant's surroundings is done by the dermal tissue system. The dermal tissue refers to an epidermis, which is generally a single layer of cells enveloping the younger segments of a plant. It discharges a waxy layer known as the cuticle, which prevents loss of water.  

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