which of the following is not mentioned in the lesson as a major energy source in this region?\no a. natural…

Brief Explanation:

Without knowing the content of the lesson, we can't determine for sure. But we assume based on common - knowledge of energy sources and the options given.

Answer:

Since no information about the lesson is provided, we can't accurately answer. But if we had to guess without any context, we'd need more details about the region and the lesson content. However, if we assume a general context, all of these (natural gas, hydropower, solar, coal) are common major energy sources. If we must choose one as the answer based on lack of information in the question itself, we can't provide a definite choice.