The H in HIPPO stands for Habitat loss, which is a significant factor contributing to the endangerment and extinction of species. Habitat loss occurs when natural environments are destroyed or altered, often due to human activities such as deforestation, urban development, and agricultural expansion. This leads to a decrease in the availability of resources that species need to survive, such as food, shelter, and breeding grounds. The acronym HIPPO helps to remember the five main threats to biodiversity: Habitat loss, Invasive species, Pollution, Population growth, and Overharvesting. Understanding these factors is crucial for conservation efforts aimed at protecting endangered species and their habitats.