What pest is Lindane primarily effective against?

Lindane is primarily effective against fleas, which is why the choice indicates this as the correct answer. Lindane functions as an insecticide that targets the nervous system of insects, making it particularly effective in controlling parasites, including fleas that often infest pets and homes. It is known for its ability to penetrate the integument of insects and disrupt their normal physiological functions.

In contrast, roaches and termites have different biological and physiological structures that may require different types of insecticides for effective control. While Lindane can have some efficacy against a broader range of pests, its specific application and effectiveness are notably highlighted when it comes to treatment of flea infestations. Soil pests typically involve a different category of pest control strategies and products aimed at underground organisms, which further distinguishes them from fleas as a target for Lindane.