You'll need a helper variable for this, so depending on your programming language, the solution becomes:
int helper;
helper = arr[i];
arr[i] = arr[j];
arr[j] = helper;
Is it asking for a web site like .edu? or something like that?
<em>A.)</em>
<em>It's either A or D both of them stand out and make sense to me so I think that it'll be right if you choose A or D.</em>
<em>-Ɽ3₮Ɽ0 Ⱬ3Ɽ0</em>