The two types of crust are oceanic and continental, the lithosphere is composed of earth's crust and upper most mantle
A control group is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.
In an ideal situation, the producers include the trees, grasses and forests.
Building of roads and parking lots involve the clearing of forests and bushes.
Therefore there would be a decrease in number of producers. And ur answer is A.
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