There are many different factors, but some are: the amount of natural resources (food, water, etc.), amount of predator/prey, and availability of shelter.
Dinosaur fossils had been known for centuries as "dragon bones" or the remains of giants, but it wasn't until Dean William Buckland of Oxford, England described the carnivorous "lizard" Megalosaurus<span> (in 1824) that they were formally studied as an extinct group of giant reptiles</span>
Answer: it contains the instructions needed for an organism to grow, reproduce, develop, and survive.
Explanation:
All of the structure of the DNA molecule work together to grow, reproduce, develop, and survive.