Environmental stress refers to the pressures and challenges that living organisms face due to changes in their surroundings. This can include factors like extreme temperatures, pollution, and habitat destruction. For example, when plants experience drought, they may struggle to survive, leading to reduced growth and even death. These stresses can also affect animals and humans, causing health issues and altering behaviors. For instance, wildlife may migrate to find better conditions, while people might experience anxiety or illness due to poor air quality. Understanding environmental stress is crucial for protecting ecosystems and promoting well-being.