Which of the following is a negative impact of human activities on ecosystems?

The choice that identifies a negative impact of human activities on ecosystems is the increase in greenhouse gas emissions that affect climate. Human activities, particularly those associated with industrial processes, deforestation, and the burning of fossil fuels, have significantly contributed to a rise in greenhouse gases in the atmosphere. This increase leads to climate change, which disrupts ecosystems and biodiversity by altering weather patterns, affecting species' habitats, and resulting in more frequent and severe natural disasters. As these environmental conditions change, ecosystems struggle to adapt, which can result in the decline of species, loss of biodiversity, and overall degradation of ecosystem services.

In contrast, the other options reflect practices that either have a positive impact on ecosystems or contribute to sustainable development. For instance, planting diverse crops enhances food security while promoting biodiversity, and creating wildlife conservation areas supports the protection of endangered species and preserves natural habitats. Utilizing organic farming practices reduces chemical use and encourages biodiversity, leading to healthier ecosystems.