Answer:
D. A substance, energy source, or organism used by humans
Explanation:
Its not man made like the others
I think the answer is visual learning
Specialization ensures that goods and services are produced by low-cost producers.
<h3>What is specialization?</h3>
It should be noted that specialization simply means the concentration of the production in a particular field.
In this case, specialization ensures that goods and services are produced by low-cost producers.
Learn more about specialization on:
brainly.com/question/24448534
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Ir is the third opinion, 100km area
