The natural resources used by society are limited by various factors. why is coal considered a nonrenewable resource? a. once coal is used up, it can never be replaced. b. coal is a nonrenewable resource, because it comes from the impact of meteors with the earth. c. coal was a renewable resource, until it was mismanaged by humans. d. coal is considered a nonrenewable resource, because it takes millions of years to form.

Answer=D

Coal is considered a nonrenewable resource because its use is non sustainable since it takes millions of years for it to form.

Explanation:

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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acceleration = 18/3 = 6 m/s per second.

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-lavira: )