For example, in a cold climate, lots of fur enables survival, which enables reproduction (which leads to these traits being passed on and becoming more common).
(lots of fur; enables; survival, which enables reproduction (which leads to these traits being passed on and becoming more common); L:in a cold climate) (these traits; being passed on; ) (reproduction; becoming; more common) (survival; enables; reproduction; which leads to these traits)
lots of fur these traits reproduction survival
enables being passed on becoming enables
survival, which enables reproduction (which leads to these traits being passed on and becoming more common) L:in a cold climate
more common
reproduction which leads to these traits