<span>abiotic factors hope this help and hope i'm right</span>
It may have been difficult to discover pond water organisms from pond water sample under the microscope comparing to cheek cell sample and leaf sample because of the large area and involved and the cheek cell and leaf sample being a living tissue.
<h3>What is a Microscope?</h3>
This is referred to as a laboratory equipment which is used in the enlargement of objects and cells and ensures that very small organisms can be seen and observed.
Living cells such as cheek cell and leaf sample are what the organisms mostly feed on which is why it is easy to see and observe them when compared to pond water.
Pond water also has a very large surface area and the sample gotten may not possess any organism which is why it may be difficult and is therefore the reason why it was chosen as the correct choice.
Read more about Pond here brainly.com/question/12876788
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