Which of the following has become today’s major cause of mass extinction? a. adaptive radiation b. human activities c. addition of new species

Its option B . Human activities

B. Human activities

Explanation:

Mass extinction can be define as the extinction or abolition of the entire population of species (s) due to a catastrophic event like volcanic eruption, tsunami, landslide, nuclear explosion and forests fire.

Among the options, given the human activities is the correct option this is because of the fact that humans are exploiting the natural resources for their own benefit. Human activities like deforestation, forest fires, nuclear explosion are the examples of the human intervention which are likely to eliminate the population of species to a level of extinction.  

2%? i tried finding the exact sorry if it's not 100% correct ; -;