alternate , depleted
guaranteed , over
natural , exhausted
sufficient , increased E. innovative , augmented
Answer is Right!
Answer is Wrong!
The correct answer is: We must explore alternative sources of energy as our supply of fossil fuel has been depleted.
- Alternative means “different from what is usual or traditional.” In this case, it refers to sources of energy that are different from fossil fuels.
- Depleted means “reduced to a lower level or amount.” In this case, it refers to the fact that our supply of fossil fuels is running out.
The other options are incorrect for the following reasons:
- Guaranteed means “certain to happen or be the case.” This is not the case for our supply of fossil fuels, as it is finite and will eventually run out.
- Natural means “existing in or produced by nature.” Fossil fuels are natural resources, but they are not renewable.
- Sufficient means “enough or as much as is needed.” Our supply of fossil fuels is not sufficient to meet our current and future energy needs.
- Increased means “made or become larger or greater.” Our supply of fossil fuels is not increasing, but rather decreasing.
- Innovative means “characterized by the introduction of new ideas or methods.” While there is some innovation in the development of alternative energy sources, this is not the main reason why we need to explore them. The main reason is that our supply of fossil fuels is running out.