Identify the nouns and their types in the following sentences.

Here are the nouns and their types for each sentence:

1. Copper is a useful metal.

   • Nouns: Copper (Proper Noun, Material Noun), metal (Common Noun, Material Noun)

2. The fleet of ships appeared on the horizon.

   • Nouns: fleet (Collective Noun), ships (Common Noun)

3. Oxygen is essential for life.

   • Nouns: Oxygen (Material Noun), life (Abstract Noun)

4. All people should love nature.

   • Nouns: people (Common Noun), nature (Abstract Noun)

5. These leaders have not served the nation.

   • Nouns: leaders (Common Noun), nation (Collective Noun)

6. The mangoes of this tree are delicious.

   • Nouns: mangoes (Common Noun), tree (Common Noun)