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Sorry, I made a mistake earlier as I misread the question. The answer should be 4.

To visualise the question better, we can substitute soil X, Y, Z with sand, small stones, and large stones respectively. When we pour water onto each of them, water will seep into the large stones the quickest since it can flow better into the spaces between them. Conversely, water will seep into sand the slowest since it is more densely packed and water cannot flow as easily.

 

Not part of the question but for extra reading:

Although water will seep into sand the slowest, once water seeps in, the sand will retain the water very well since it is more difficult for the water to escape. This is why sand remains wet for a long time.

Conversely, while water will seep into the large rocks the quickest, the rocks are unable to retain the water as the water will simply flow through and downwards into the ground.

If the soil were not contained in beakers and this experiment was carried outdoors where the water can flow downwards into the ground, the answer would then be 3.

Sorry for the mistake and hope this clarifies.

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Thank you very much!

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