Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Keoladeo National Park' has mentioned 'Food' in the following places:
Occurrence Sentence Text Source
The aquatic vegetation is rich and provides a valuable food source for waterfowl.
They are food for many fish and birds, as well as some animal species, and hence, constitute a major link in the food chain and functioning of the ecosystem.
The fish population and diversity are of high ecological importance as they form the food source of many birds.