Select the option that can be used as a one-word substitute for the given group of words.
Plants of a particular region

Correct option is A

The option that can be used as a one-word substitute for the given group of words "Plants of a particular region" is (a) Flora.
•  Flinch means to make a quick, nervous movement as an instinctive reaction to fear or pain.
•  Fauna refers to the animal life of a particular region or time.
•  Flotsam refers to the wreckage of a ship or its cargo found floating on or washed up by the sea.