In the past few decades, the average height of adults in western countries has not changed much. this indicates that height for adults in these countries has reached the upper boundary of their

Reaction range

Explanation:

The reaction range is when the phenotype (the characteristics an organism expresses and are visible) of an individual is dependent on its genetics and the environment, this means that the height is being limited by genetics and te environment.

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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.