Match the following. systems
physical systems
processes initiated by people that shape earth's surface and
1. interact with plant and animal life to create, sustain, and
modify ecosystems
2. activities occurring in nature that shape the earth's surface
processes occurring in nature that shape the earth's surface
3. and interact with plant and animal life to create, sustain, and
modify ecosystems
physical and human processes that shape the earth's surface
4. and interact with plant and animal life to create, sustain, and
modify ecosystems
human systems
physical processes