Question

Gasoline is costlier than any other fuel. (superlative degree)​

Answer 1

$\large \sf Gasoline \: is \: the \: \underline \red{costliest} \: fuel.$

Answer 2

$\huge{\textbf{\textsf{{\color{Magenta}{⛄Q}}{\red{u}}{\purple{e}}{\pink{s}}{\blue{t}}{\green{i}}{\red{o}}{\purple{n⛄}}{\color{pink}{:}}}}}$

Gasoline is costlier than any other fuel. (superlative degree)

$\small\mathfrak\pink{answer}$

$\small\orange{\textbf {\textsf{Gasoline\:is\:the\:costliest\:fuel }}}$

$\small\purple{\textbf {\textsf {hope\:its\:helpful}}}$

⟼$\small\sf\underline\red{answered\:by\:KIMU}$