We would be in poor shape
It would likely be oil, as it is the most versatile and widely used fossil fuel. Oil is essential for transportation, heating, electricity generation, and various industrial processes. Finding alternative sources for all these applications would be the most challenging compared to other fossil fuels.
Gasoline is because it is a product of oil, which is a fossil fuel. None of the others would qualify.
Sand
Coal is a fossil fuel.
No its not a fossil fuel
Oil is a fossil fuel.
Fossil fuel is cheap
Fossil
Gasoline is a fossil fuel.
Sorry, no, wool is not a fossil fuel.
Fossil fuels weren't invented, they simply exist, fossil fuel is just that, decayed/fossilized matter from thousands of millions of years ago, we just refine the fuel. And if we had never discovered the fossil fuels, more likely than not we would only be using electricity for things such as cars, heating, and other such things that use these fossil fuels. Or perhaps they would all run on ethanol (a..sort of wast product of corn) So, if fossil fuels were never discovered our lives would very likely be much the same as they are today, but, well, less polluted.
Yes it is a fossil fuel.