He died of 'natural causes'. [=he died because he was ill or old and not by being killed in an accident, battle, etc.]
She was adopted immediately after she was born and never knew her 'natural' [=(more commonly) 'birth'] parents.
a country rich in 'natural resources' [=a country that has many valuable plants, animals, minerals, etc.]
(..) She died on you. Here I thought you'd become Father of the Year, but you just got stuck. Yeah, well, look, I don't have to tell you, I'm not a natural caretaker... but with Willy, you know, I checked all the boxes... and he still turned out softer than wet cheese. I don't get it. (..)2013 TvShow: Community Title: Cooperative Escapism in Familial Relations Season: 4 Episode 5