Why is there div class and div Id for same section?

[clinkclankimatank]

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I saw this code in the first page of the exercise. I dont understand why we use div id=head-text? the entire text is already inside the div header
If i wanted to change the text couldnt i just select the .header?

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Appreciate any input.
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[mtf]

It’s possibly a separation of concerns. header may apply position and dimension properties (layout) along with border and background, while header-text may apply presentational styles.

[clinkclankimatank]

ohh I see. So it would keep things neater by separating them. that makes a lot of sense.

thank you