At least one-quarter of the medicines we buy in the developed world have their_____ in tropical forest plants.

People are wondering about his ______ behavior.

Oil pollution causes the hair to become matted, which reduces its _______ as a thermal insulator.

Kirana has just bought some new dresses . Which of the underlined words is categorized as noun?

To have a better future, each student should be able to have the access to quality _________

The correct examples of nouns formed from another nouns are….