Built environment: The built environment encompasses all human-made structures such as buildings, roads, bridges, parks that shape the physical landscape in which people live and interact.
Natural environment: The natural environment refers to all aspects of the physical world not created by humans. It includes landforms (mountains, rivers), climate patterns (temperature, precipitation), flora/fauna (plants/animals), etc.
Human-environment interaction: Human-environment interaction explores how people modify their surroundings or adapt to them. It examines how human actions impact ecosystems or how environmental factors influence human activities.