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gametangium is the problem
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Answer:
COAL
Explanation:
Secondary energy refers to the more convenient forms of energy which are transformed from other, primary, energy sources through energy conversion processes. Examples are electricity, which is transformed from primary sources such as coal, raw oil, fuel oil, natural gas, wind, sun, streaming water, nuclear power, gasoline etc., but also refined fuels such as gasoline or synthetic fuels such as hydrogen fuels.
"organ, organ system, organism" is the one among the following that represents a correct sequence of levels within the hierarchy of life. The correct option among all the options that are given in the question is the last option or option "D". I hope that this answer has come to your help.