Using pest-resistant plants in landscaping primarily helps to:

Using pest-resistant plants in landscaping primarily helps to reduce pesticide use. When plants are resistant to pests, they naturally require fewer chemical interventions to control pests that can harm them. This leads to a healthier ecosystem as there is less reliance on synthetic pesticides, which can have detrimental effects on non-target organisms, beneficial insects, and the surrounding environment.

Additionally, pest-resistant plants can lead to greater resilience in landscapes, reducing the need for ongoing maintenance and interventions, which can often entail labor and costs associated with applying pesticides. This contributes to a more sustainable approach to gardening and landscaping, allowing for an environment that supports diverse plant and animal life while minimizing chemical inputs.

The other options do not align with the primary benefit of pest-resistant plants. Reduced labor costs may be an indirect benefit as fewer interventions might lead to lower maintenance needs, but it's not the main purpose of using resistant varieties. Similarly, pest-resistant plants aim to enhance the aesthetic and functional value of landscapes rather than decrease it, and while healthy plants can contribute positively to soil quality, it's not the immediate goal of selecting pest-resistant varieties.