Please answer these two questions

Dear student, 

For answer to your questions follow the below given links:


https://www.meritnation.com/ask-answer/question/why-is-crude-oil-necessary-for-economic-development/development/10472737

https://www.meritnation.com/ask-answer/question/why-ground-water-is-an-importanat-source-of-water-pleas/water-a-precious-resource/1953564