The primary challenge of preventing biological invasions in ecosystems is the complexity of predicting and managing invasive species' impacts. Invasive species often thrive due to the disruption of native ecosystems, outcompeting indigenous species for resources. Furthermore, human activity frequently facilitates their introduction and spread, making control measures difficult. Addressing the problem requires comprehensive strategies that include early detection, management plans, and public education. Effective legislation and collaboration among stakeholders are also key to mitigating the risks posed by invasive species. Preventing these invasions is essential to maintaining strong and resilient ecosystems.