Answer:
Natural: mountains, rocks, soils, ecosystems, etc.
Manmade: artificial streams or tributaries, roads, farms, etc.
Explanation:
A watershed a geographical area that drains all forms of surface water (rainfall or snowmelt) from higher altitudes (e.g. top of mountains) to the lower altitude (e.g. rivers) thus draining the water to the same place.
Since watershed is a large area, it often comprises both natural and manmade features. Manmade features are typically the roads or (small) cities that are developed by humans in the hilly areas. On the other hand, natural features are developed due to the natural action of hydrogeological and/or meteorological conditions over the course of longer time periods.
