Answer:
The answer is d. volcanos
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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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An example would be acid rain because acid is a chemical.
Answer: Autologous Transplant
Explanation
From the prefix AUTO, it refers to the self transplant, that is Tony gets his own stem cell. , and not from another person/ donor.
If the stem cells were from another person it is refers to as Allogeneic transplantation, that is ALLO transpant.
