I believe the best answer is A.
People are more afraid in fossil fuels running out rather than the other reasons that don't really affect the people today. Hope it helped!!!
A spreadsheet is a computer application for organization, analysis and storage of data in tabular form.
Energy<span> cannot be created or destroyed, but it </span>can be saved<span> in various forms.
</span>The term that denotes <span> the capture of energy produced at one time for use at a later time is energy storage.
Thermal energy might be saved up for future use.
</span>Thermal storage is used for electricity generation<span> by using power from the sun, even when the sun is not shining</span>
There Are 4 Valence Electrons So do the one with 4 valence electrons