Read the paragraph What problem is explained in the paragraph?
On her first day of a beach vacation, Carla built a sand
castle. It had turrets and a moat. She decorated it with
shells and seaweed, and it seemed to sparkle in the
afternoon sun. She knew it could not last forever, but she
wanted to remember how great it looked. The tide was
coming in, though, and the waves inched closer to the
castle. Carla had an idea about what to do.
O the timing of the vacation
O the castle's appearance
O the afternoon sun
O the approaching waves
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