A natural number is any positive integer that starts from 1 and continues indefinitely.

Natural philosophy was the precursor to modern science.

Many countries rely on natural resources for their economic development.

Natural science explores the laws and principles that govern the natural world.

Natural selection is the process by which certain traits become more or less common in a population over time.

Natural gas is a clean and efficient source of energy.

She has always been fascinated by natural history.

She is known for her good-natured personality.

For him, playing the piano is second nature.