Which of the following statements is true about goods and services?
a. they can be touched -- they are both tangible.
b. together, they represent everything that can be bought or sold.
c. they are never scarce.
d. they have no economic value.

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.

that is alot i do not no