Brachiopoda hope this helps :)
1,203,375 different species of animals on earth and 1,589,361 different species of plants on earth (so your answer is more)
It is b because it just is
Founder effect or population bottleneck refer to events which bring about reduction in the genetic variability of a particular specie population. Such events typically drastically reduce the gene pool of the population and produce a smaller number of population with less genetic diversity. An example of a population bottleneck is a genocide event. Such event will destroy a large percentage of the affected population leaving only a smaller population with less genetic diversity. i hope these helps.
