Which fossil fuel should be available for the longest time if current usage continues?

your answer should be c) enjoy!

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

measured, submerged.