The answer would be B.
The new species will start competing for all of the necessities that everything else needs to survive resulting in everything else reducing in population size.
Hope this could help,
Trey
21. on first attachment is secondary succession
22. is the degree of variation of life....
genetic, species or ecosystem within a specific area, system or planet
23. the last one is wrong = )
Thanks for the question,
To classify organisms, scientists use similarities and variations among species. typically these variations area unit simple to ascertain, like whether or not associate animal has fur, feathers, or scales. There area unit seven main assortment ranks: kingdom, phylum or division, class, order, family, genus, species.
<h3>Hope it helps!</h3>