Tom was in a coma after an automobile accident which killed his wife. His physical health improved and there is no medical reason why he should not be able to move his arms and legs. Tom may be suffering from:

If the inability of Tom to move his arms and legs has no apparent physical reason, it is likely that Tom may be suffering from conversion disorder.

Explanation:

Conversion disorders have a psychological basis, and they are dissociative disorders where there is a functional disturbance for no apparent reason. The term conversion means that a psychological problem can become a physical manifestation.

Tom is not able to move his arms and legs, but there is no medical reason why. Because of the trauma of losing his wife in an accident, it is possible that the cause of his paralysis is psychological, due to a conversion disorder secondary to a depressive disorder.

Learn more:

Difference between illness anxiety disorder and conversion disorder link

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]