Successful restoration programs may involve which of the following actions?

Successful restoration programs often focus on improving the overall health and functionality of ecosystems, especially in regard to water bodies that may have been compromised. Removing debris and silt from water bodies directly addresses some of the fundamental issues that can impair water quality and habitat availability. Excessive debris and silt can lead to reduced oxygen levels, hinder aquatic life, and diminish the natural flow and filtration of water. By clearing these materials, ecosystems can return to a more natural and functional state, allowing for better water quality and supporting the organisms that depend on these environments.

While the other options may be part of different restoration efforts, they do not necessarily tackle the immediate need to improve water quality and habitat health as effectively as removing debris and silt. For example, planting new vegetation is essential for restoring habitats but is often more effective after addressing underlying issues such as siltation. Similarly, while removing aquatic animals may be warranted in overpopulation scenarios, it does not directly enhance water quality. Installing new water features might improve aesthetics or habitat complexity, but if the existing conditions are poor due to debris and silt, those features are unlikely to succeed as desired.