$\text{O} ~ \text{Vs} ~ \text{X}$

$\text{(X)}$ selected the stratygical cell of game means the central cell.

If both players playing optimally the game , $\color{#3D99F6}{X}$ will be win the game.

One scenario is in below :

Since both players are assumed to play optimally, the best move for X will be to occupy any of the corner's in the first move. O then only has one option which is to occupy the opposite corner otherwise X will win easily. After O occupies the opposite corner, X makes the move occupying the corner that O needs to occupy at this point to win the game. Doing this X obstructs any of O's potential move to win as well as force himself into winning by granting himself two wining spots.

The question seems a bit odd. Since it's X's turn, O can do nothing but wait for X to play. And considering what the note says, $\ast$ $any$ $\ast$ move that X would have played is a winning move (for X), so O can't even force a draw at that point.

In order to get the fork shape filling if the boxes X will fill any of the top corners making sure of his victory hence O cannot force a victory.