Which type of rock was the first to exist on the planet? A
igneous

B
sedimentary

C
metamorphic

Explanation:

Las edades aproximadas tienen un margen de error de millones de años. En 1999, la roca más antigua conocida en la Tierra tenía una fecha de 4.031 ± 0.003 mil millones de años, y forma parte del Gneis Acasta del cratón Slaves en el noroeste de Canadá.

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.