Glucosinolates protect _________ plant from pest attack.

Glucosinolates are a class of secondary metabolites containing sulfur and nitrogen, which are primarily found in plants of the family Brassicaceae.

When the plant tissue is damaged by pests or herbivores, glucosinolates are broken down by the enzyme myrosinase into toxic compounds such as isothiocyanates, which act as a defense mechanism against pest attack.

Among the given options, cabbage belongs to the family Brassicaceae. Therefore, glucosinolates protect cabbage plants from pest attack.

Answer: cabbage