Identify what algorithm or concept the following code relates to$.$

void Func$($int array$[],$ int tempArray$[],$ int left, int right$)$

$\{$

int i$,$ j$,$ k$,$ middle;

if$($right $>$ left$)$

$\{$

middle right $+$ left$)\frac{?}{2}$;

Func$($array$,$ tempArray, left, middle$)$;

Func$($array$,$ tempArray, middle $+1,$ right$)$;

for middle $+1$;$i>$ left; $--i$

tempArray $[i-1]=$array$[i-1]$;

for$($j $=$ middle; j $$ right; $]$;

else

array$[$k$]=$ tempArray$[$j$--]$;

$\}$

$\}$