Correct Answer - Option 2 : Only assumption II is implicit
From this information, we cannot assume that the next generation will have renewable source of energy as there is no inclusion of renewable energy in the given statement.
Therefore, Assumption I is not implicit.
On the other hand, We can assume that if non - renewable sources of energy go exhausted, the next generation will not be able to use them and will have to think of alternatives as non - renewable energy will extinct if we are not saving it.
Therefore, Assumption II is implicit.
Hence, the correct answer is "Only assumption II is implicit".