Environmental modifications refer to changes made to the natural environment to improve human living conditions or to support specific activities. These modifications can include building infrastructure like roads, bridges, and buildings, as well as altering landscapes through activities such as deforestation, irrigation, and urban development. Such changes can have significant impacts on ecosystems, affecting biodiversity and natural resources. For example, the construction of dams can create reservoirs for water supply but may also disrupt the habitats of local wildlife. Understanding these modifications is essential for balancing human needs with environmental sustainability.