The best unit to measure a required yard area is foot.
It is the reference quantity in which other similar quantities can be measure.
Given that,
Kimberly wants to measure the area of her backyard.
So for measuring a yard,
Centimeter unit very small reference
Similarly, Kilometer and mile is very large references.
∴ The best suited unit is foot to measure the backyard area.
To learn more about units, refer to the link:
https://brainly.com/question/19244145
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