Elephants can show signs of stress or anxiety in response to environmental changes in various ways. Some common signs include increased vocalizations like trumpeting, restlessness, pacing, decreased appetite, aggression, and even self-harming behaviors such as repetitive swaying or head-bobbing. Additionally, elephants may also display physical signs of stress like weight loss, hair loss, or changes in their posture. It's important to closely monitor these behaviors and seek the guidance of experienced professionals to address any stressors affecting the elephants' well-being.