Sagot :
In my opinion those would be the following
Less food to eat and less water
Too much cutting of trees
Destroying their natural habitat
Hunting in dangered species
Too much getting of natural resources through our own personal needs
Over population of people
Pollution of different places like water,land,air,etc
I hope this helps :)
For me, it's because of the climate change. Certain species migrate to other places where they are fitted to. For example, polar bear. Due to melting of ice caps there are possibility that they become extinct as the ice melts.