Final answer:
The highest level of biological organization is the biosphere, which includes all of the Earth’s ecosystems and living organisms.
Step-by-step explanation:
The highest level of biological organization is the biosphere. The biosphere encompasses all of the Earth’s ecosystems, including the atmosphere, lithosphere, and hydrosphere. It is made up of all living organisms and their environments, interacted with each other and with their physical surroundings.
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