Which one is NOT a natural phenomena? a. Tsunami
b. Volcanic eruptions
c. Biological processes
d. Water fountain​

These factors threaten north americas ecosystems

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

The earth rotates on its axis and revolves around the sun every