Choose the word that can substitute the given group of words.

The animals of a particular region

Fauna

The word that can substitute the given group of words is fauna.

• Phylum is a taxonomic category that is larger than a class and smaller than a kingdom.
• Blossom is the flowering part of a plant.
• Fauna is the animal life of a particular region or time.
• Flora is the plant life of a particular region or time.

Fauna is the most appropriate word for the given group of words because it specifically refers to the animal life of a particular region or time. It is derived from the Latin word fauna, meaning "animal."