Natural landscapes are beautiful.

The flowers are beautiful and natural.

She is a natural beauty.

A natural number is a positive integer.

Natural numbers are positive numbers without a decimal point.

Natural selections favor the survival of the best-adapted species.

Natural selection is a key process in the theory of evolution.

Still lifes are paintings of still lifes.

Natural gases are an important source of energy in many countries.

Liquified natural gas is used as fuel for vehicles.