Hi, I making the quiz for my research. How can change the quiz image by question ID or submit Button?

Hi
Im Japanese student
I making the quiz and there is a image for each question.
I want to change the this image when push the submit button or when the question ID have changed.
But I cant slove this problem.

I have just start use unity and Im biginner, I need finish this work by next month and I need write Graduation thesis quickly.

this link is my Demo Asset, maybe it can help you to find problem.
https://ufile.io/mowpm

thank youlink text

Hey!
If I understood everything, you just want to change an image? Use UI (tutorial in case u need it ^^) for that (Only Pseudo-code, might not work in unity):

public Image reference;

public List<sprite> QuizImages = new List<sprite>();

void Update() 
{
     //You could also make some function for a UI button
     if(PressedSubmit) 
     {          
          //Change the UI Image to the image at the given index
           reference.image = QuizImages[whatever Image index];
     }
     //In case you want randomization
     if(PressedSubmitRandom) 
     {
           reference.image = QuizImages[Random.Range(0, QuizImages.Count -1)];
     }
}