* Corrected enum code. Cannot declare:
public enum phylum;
Since this code will produce an error. If someone will copy the same code, it will not compile and run. I updated the code so that when someone will copy the code, it will not produce an error.
* I also updated the spacing and tabbing on code.
* Corrected the constructor DefineAnimal to Animal since the name of the class is Animal and DefineAnimal will produce an error.
* Remove enum on parameter of constructor since this will produce an error.
* Corrected class Dog as public enum breed will produce an error.
