Melanin is the only one out of the 3 pigments that can contribute to skin color that is actually produced in the skin itself.
Answer:B
Explanation: Someone told me
So yellow is mostly the classification of <em>Metal, </em>But I don't see that option here. Answer-Blue
The railroad industry used coal to power steam engines, allowing businesses to build more factories for the production of goods.
Explanation:
It is also during the 1800s that the use of coal power enabled the smelting of iron and steel, in addition to the powering of steam engines. Coal and steam engines enabled the building of railroads to transport goods from industries.
Before the discovery of coal in the 1600s, energy was sourced from water wheels and the burning of biomass.
In addition. 1950s saw coal production decline to its lowest levels because it was overtaken by petroleum as the main source of energy.
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