Rainbow trout is non-native to the united states. however, this species is breeding with the native gila trout. scientists recently observed that the gila trout were becoming extinct. what is the cause of their extinction?

There habitat was damaging by water logging, and the diversion of water.
Hope this helps.

The extinction is caused because when an invasive species comes, they edge out a native one. So since the rainbow trout are mating with the Gila trout, the Gila trout aren't mating as much and the species is starting to decline

The answer is oh i forgot 

Dis the awnser because they are going from high to low