Identify the name given to the fact that a function defined within another function $($i$.$e$.$ inner function$)$ has access to variables of the surrounding function $($i$.$e$.$ outer function$),$ as depicted in the code below.

function outer$()\{$

let test $=10$;

function inner$()\{$

console. $log($test$)$;

$\}$

$\}$

closure

conditional

timer

script