What is the difference between HTML structure elements and HTML content elements?

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Sorry for the maybe vague question but im an early programmer and one of my assignments detailed asking me to have 5 structure elements and 10 content elements for the html part of my website. Im just not sure what the main difference is or what they even are.
Would structure elements be stuff lile

and content be

? Any examples or lists which categorieses the two will be very helpful ty!

What I have tried:

Would structure elements be stuff like

and content be

? Any examples or lists which categorieses the two will be very helpful ty!