Natural selection is the process by which favorable traits are passed down through different generations of a species in order to adapt and likely survive within the changing environment.
Self reliance simply means not having to depend on others-
And for whom by any chance isn't sure here's google's response:
<span>reliance on one's own powers and resources rather than those of others.</span>
Answer:
to persuade readers that rivers have a unique beauty
to entertain readers with poetic description of a river
Explanation:
I just took the Checkpoint :D