Question

4. Many different food chains link up to form a:
food ecosystem:
a. hydrosphere, lithosphere, atmosphere
b. natural and human made environment
c. hydrosphere and atmosphere
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Answer 1

natural and human made environment

A food chain describes how energy and nutrients move through an ecosystem. At the basic level there are plants that produce the energy, then it moves up to higher-level organisms like herbivores. After that when carnivores eat the herbivores, energy is transferred from one to the other.