The answer is: B. devolution
Answer:
B. Their predators have been killed by the Cretaceous-Paleogene extinction
Explanation:
The mammals and the avian dinosaurs were small creatures, living in the shadows of the dinosaurs which dominated the world, but also were stopping the further increase in size and development of these animals. At the end of the Cretaceous though, an asteroid struck the Earth. The impact was so hard and devastating that it managed to destroy the dinosaurs and wipe them out of the face of the Earth, with the only dinosaurs remaining being the small avian species. Since lots of niches opened up and where free for taking in the ecosystem, the mammals and the avian dinosaurs quickly started to evolve, diversify, and become much larger. The mammals seem to won the race for dominance as they have become the most dominant species on the planet.
Well first off you can learn about Global Warming and how to help stop it so you can make a difference in the world! You could also learn about what types of animals that you can save or that you want to help or maybe even what to do about all sorts of stuff that you want to learn about.
Cities are urbanized areas, farms are rural areas, so basically urbanized areas are areas with a concentrated amount of people and buildings and factories and technology and all that
The smallest country in mainland Africa is The Gambia with a total land area of 10,689 km². It is enveloped by its neighboring country, Senegal.
