Dinosaur Extinction

Have you ever thought about what happened to the dinosaurs that once roamed the Earth? Well, scientists have developed several ideas through out the years. One idea is that a giant meteorite crashed into our planet and caused a huge dust cloud to cover the Earth. The dust cloud was so enormous that it kept the sun’s rays from reaching Earth. This caused all of the plants to die. With nothing to eat, the herbivores died. The large carnivores also died, leaving the planet without dinosaurs.

Dinosaur Die-out: Competing Theories

There are many theories about how dinosaurs came to be extinct. Scientists do not all agree about what may have happened. The most recent idea says that a giant meteorite crashed into the earth. It kicked up enough dust and dirt that the Sun’s rays did not reach Earth for a very long time. This prevented plants from making their own food via photosynthesis. Plant-eaters and then, meat-eaters died due to a lack of food.

The other leading idea says that dinosaurs died out when the Earth went through a time of volcanoes erupting. Like the meteorite idea, it is thought that the volcanoes spewed enough ash into the air that the Sun’s rays were blocked. This also caused plant and animal life to die.

Which of the following sentences integrates information from both of the above texts?