Flora is the __________ life occurring in a particular region or time

The correct answer is: plant.

Flora is the plant life occurring in a particular region or time. It is a Latin word meaning “flower” or “plant”. The term is used in botany to refer to the plant life of a particular region or time period. Flora can also be used to refer to a collection of plants, such as a botanical garden or a herbarium.

The other options are incorrect because they do not refer to plant life. Animal refers to the animal life of a particular region or time. Human refers to the human life of a particular region or time. Microbial refers to the microbial life of a particular region or time.