why do we use sets?

[Sasooo]

English Grammar Tests, Elementary Level

ESL/EFL Test #116 "Weather Test (3)", question 2

As the sun ......... at the end of each day, the sky glows with a beautiful array of colorsin red, yellow, orange and pink hues.

(a) rises
(b) bursts
(c) sets

English Grammar Tests, Elementary Level

ESL/EFL Test #116 "Weather Test (3)", answer 2

As the sun sets at the end of each day, the sky glows with a beautiful array of colorsin red, yellow, orange and pink hues.

Correct answer: (c) sets

Your answer was: incorrect
As the sun rises at the end of each day, the sky glows with a beautiful array of colorsin red, yellow, orange and pink hues.
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why do we use sets?

[Kitosdad]

At the end of each day................. the sun sets. It's called sunset.

The sun rises at the start of the day. It's called sunrise.

Nice to see you again Sasooo.
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