Question

Which is called as black gold
___________​

Answer 1

Answer:

$\huge\mathcal\colorbox{gold}{{\color{black}{ᴀɴsᴡᴇʀ~~↓~↓}}}$

$\huge\bold{petroleum}$

Petroluem is known as black gold as it is black coloured crude oil that is extracted from earth's crust and it has its value as it is limited in stock, takes millions of years to form and is costly available.

$\huge\bold{hope \: it \: helps!!}$

Answer 2

Black gold is a term applied to oil or petroleum