Answer:
Step-by-step explanation:
Surfers would love the waves, but whoever built the sand castle would not. Was a mistake made where the castle is now?
Likely not. The sea was calm and the castle could have been built anywhere. But change brings learning, and a sandcastle is not impossible to reconstruct.
There is no wall that could protect the castle from being destroyed, so it must be built further back where the severe winds and waves will not effect it. Whoever built the castle learned and made a windmill, forgetting all about the wall.