Hedge
Fence
Look at the dirt on the ground at dawn and you'll be able to see all the hedges growing in the area really well. At any other time of day, hedges tend to blend into their surroundings. But at dawn, the shadows the sun makes really helps them stand out.
This hedge also works as a fence. It borders an area and you can't walk through it. A natural fence!
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かき
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You're looking intently at one particular hedge because yesterday you dropped your car keys (かき) behind it. Now that you know where the hedge is you're going to need to search it to find your car keys.