The very right of the diagram.
Some dinosaur only ate plants and no meat. As plants became extinct the dinosaur who ate plants couldn’t get the food they need so they starved.
Answer:
To be honest the Atmosphere is 72 percent nitrogen and 25 percent oxygen and
Natural selection means that the organisms better adapted to their environment, that is, they have developed the right characteristics/skills/response to the external ambient, have higher chance to survive, making the next generations genetically inherit such acquired surviving characteristics.
These generations will thus have a higher chance of survival, making these species being "naturally selected" as survivors, while those who haven't or are slower in this process, have a higher risk of elimination.
Actually, it is both acquired and part of your DNA. There is a logical <span>explanation but you have to figure that out on your own.</span>