I need a help about multiple questions poped up

Hi guys! I am very new to unity 3D, and i have no idea how to add multiple question to specific components.

I am setting up a structure in the sky, and i want to add multiple questions to the structure.

Now, i created empty component named as a structure, then added a structure which is in the sky as a child. I also added box collider to empty component right bottom of "a structure".

What i want to do is if the character goes near a structure, multiple question will be poped up, and if the character got wrong answer, the structure will be fall to the bottom, and the character standing under the structure will died. (I added the screenshot what i have worked)

Please help me!

I know there are lots of clever people who can help me here.

I do not need whole works. I need a way how to do it!

I love you guys

Thank you so much

I hope that you guys have an amazing day!