Which of the following arising out of mass extinction serves as an advantage to nature?
new genes are added to the gene pool of extinct species.
new, more adaptable species flourish, replacing the extinct species.
new varieties of species similar to the extinct ones are added to nature.

New, more adaptable species flourish, replacing the extinct species.

Explanation:

Mass extinction can be defined as the when both a large amount animal and plant species become extinct or die due to factors such as natural causes, environmental changes , climate changes e.t.c.

Animal and plant species have the ability to adapt to changes in their environment or climate but if these changes occur in a manner that is quite fast, animals and plant species would not have the time to adapt. This causes them to become extinct.

One of the advantages of Mass extinction to nature is that the extinct species are replaced by new , adaptable species which tend to flourish very well in their environment.

every el niño cycle is different. every year.