Why is the independence of the courts necessary for a limited constitution, and how is that independence ensured?

The independence of the judicial branch is ensured by making sure that the judges cannot receive a reduction in their salary and cannot be removed from the bench by a president who might oppose the judge's views. This gives judges a security in their job that allows them to make decisions without worrying about political pressures.

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explanation:

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.