What's the blunder here?

Kindly take a look at this position. White knight moves to e2. Engine says its a blunder. The engine says queen to d2 is the best. I don't quite understand. Any help? Thanks.

Merci Melvin! Am getting the concept now. Thanks alot. At my rating things are not that obvious though .

Man, it's a blunder because Black can make a check with Queen on  f2.

Then Black can move pawn on h 6... and you would be forced to withdraw your Bishop from this important diagonal.

I think the Computer calculates that this way.

Thanks for the insight. I got it! @korotky_trinity.

I tried to analyze it. Wasn't that easy to see at my level. With the explanations it's obivious though