A pool of standing water could be hiding the deep sinkholes that are present in the pool for draining the water away. So, the correct option that matches with statement above is B.
Standing water refers to a condition of water in the pool when it is more still than the movements displaced by the way of waves and there is very less atmospheric pressure on the water.
- When a water is in standing condition the reflection is more visible to the naked eyes as reflection is in greater number. So it is easier to see the water reflection in standing water in a pool.
- After the water stays in standing condition for a while it will become smelly or dirty due to displacement in the water and the molecules begin to form bacteria under water.
- One of the properties of standing water is to provide reflection and hence it becomes difficult to see through such water which makes the deep sink holes invisible.
Hence, the correct statement will be A pool of standing water could be hiding deep sinkholes present in the pools that drain away the water. And the correct option is B.
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