What is the purpose of using soil amendments in landscaping?

The purpose of using soil amendments in landscaping is primarily to enhance soil structure, aeration, and nutrient content. By incorporating various amendments, such as organic matter, compost, or minerals, the soil can improve its physical properties, facilitating better root growth and water retention.

Healthy soil structure allows for adequate aeration, which is crucial for plant roots to access oxygen. Additionally, enhancements in nutrient content ensure that plants have access to the essential minerals they need for growth, leading to healthier and more vigorous plant development.

While the other choices mention aspects such as toxicity or degradation, these do not align with the beneficial intent behind using soil amendments. The focus is on improving the conditions of the soil for the benefit of plants, rather than harming them or the environment.