Identifying Non-Beneficial Insects

The question asks to identify the insect that is not beneficial among the given options. Let's examine the role of each insect:

• Lac insect: Produces lac, a resin used in polishes, dyes, and other products. This makes it economically beneficial.
• Silk moth: The larvae (silkworms) produce silk cocoons, a valuable textile resource. This is a beneficial insect.
• Honey bee: Essential pollinators for many crops and plants, and they produce honey and beeswax. Highly beneficial.
• Termite: Termites primarily consume dead plant material, including wood. While they play a role in decomposition, many species are considered significant pests, causing substantial damage to wooden structures and buildings. They are generally not considered beneficial in the context of human interests or agriculture.

Based on the typical classification regarding human benefit and economic impact, termites are considered pests rather than beneficial insects.

Therefore, the insect that is not beneficial is the Termite.