Which step involves focusing on preventing insect entry indoors?

The focus on preventing insect entry indoors is best addressed by concentrating on prevention strategies. This step emphasizes proactive measures to block potential access points for pests before they can enter a structure. Common preventive actions may include sealing cracks and gaps around windows, doors, and other entry points, as well as implementing barriers such as door sweeps and screens. By taking these preventive measures, the risk of pests infiltrating indoor spaces is greatly reduced, making it a fundamental aspect of pest management.

Other options may involve control measures that happen after pests have already made their way indoors or tackle specific pest populations rather than addressing the underlying issue of entry prevention. For instance, indoor control typically focuses on managing pests that are already present, while outdoor control is about managing the pest population outside to prevent them from coming indoors. The reduction of on-host parasites pertains to managing parasites on specific hosts, which does not directly involve preventing insect entry into structures. Therefore, concentrating on prevention distinctly aims to stop pests before they can cause problems inside.