Answer:
The correct answer is option A: wood
Explanation:
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Let's solve this!
We will analyze each of the options:
Wood: with wood we can burn it and make fire to heat the house in winter.
Natural gas: it is very likely that there is no gas network
Solar energy: this option could be, but as it is winter, the sun that accumulates in the panels will not be enough to heat the house.
Electric oven: as there is no electricity, this will not work.
After the analysis, we will conclude that the correct answer is option A: wood