What includes both a person and a jellyfish?\nOptions:\n- humanity\n- headache\n- nature\n- natural world\n- society
Please answer and provide answer explanation.
User
All kinds of living beings exist in their own ecosystems. Ecosystems are made up of all natural things around a living being. All ecosystems together form the natural world. Humans and jellyfish are kinds of living beings existing in the natural world. The final answer: natural world.
Assistant