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Answer:
1. Chemical energy
2. Crude oil
3. (dko alam, sorry)
4. Natural gas
Explanation:
1.The kind of energy the wood has to begin with is called chemical energy because it can be released through a chemical process like burning
2.Crude oil means a mixture of hydrocarbons that exists in liquid phase in natural underground reservoirs and remains liquid at atmospheric pressure after passing through surface separating facilities.
3.~~~~
4. natural gas, also called methane gas or natural methane gas, colourless highly flammable gaseous hydrocarbon consisting primarily of methane and ethane. It is a type of petroleum that commonly occurs in association with crude oil.