Because they offer a high level of control over key variables, laboratory experiments tend to have a high level of

Internal validity

Explanation:

Laboratory experiments are the experiment that is conducted in labs with the tight and high control of variables and conditions.They can be managed with high accuracy and provide precise results due to specific measurements.

As, laboratory experiment have high level of controlling mechanism over the variable in an experiment , it tends to show high internal vapidity.There is freedom of manipulation and alteration in key and independent variables .

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answer; ///approx///5,000 miles;