Natural resources are resources that exist without actions of humankind.
Examples are -
Oil and Natural gas
In terms of the source of origin, natural resources can be divided into the following types:
Biotic: these resources come from living and organic material, such as forests and animals, and include the materials that can be obtained them. Biotic natural resources also include fossil fuels such as coal and petroleum which are formed from organic matter that has decayed.
Abiotic: these resources come from non-living and non-organic material. Examples of these resources include land, fresh water, air, and heavy metals (gold, iron, copper, silver, etc.).