* "Conservation of natural resources is crucial for the future of our planet." (Here, "conservation" refers to the act of preserving resources.)
* "The museum's focus on art conservation ensures the preservation of valuable works." (Here, "conservation" refers to the specific act of preserving art.)
* "Conservation is a complex issue that requires careful planning and cooperation." (This sentence emphasizes the abstract concept of conservation as a whole.)
Important Note: An abstract noun is a noun that refers to an idea, quality, or state rather than a physical object. "Conservation" embodies an idea or concept, making it an abstract noun.