Question confusion?

Your original assessment is flawed. Either that or you are not realizing that the methods given are 'method signatures' (which consist of both the name of the method plus the order of typed parameters for the method.

If you don't get it, you can just try it out. Create a subclass of Animal and try out every method. Create a subclass of actor (and not Animal) and try every method which worked in the Animal class.

ok wow then my answer is now A) . I did as you suggested and move(); in the Actor class gave an error "method move in class greenfoot.Actor cannot be given types; required: int; found: no arguments; reason: actual and formal argument lists differ in length." Doing this individually helped me pick the right answer but I am still confused. I went back and read over chapters 1-3, including the the brief summary of method signatures in my Greenfoot book and I think the reason move(); didnt work for the Actor class is because it has to be assigned to the animal as Actor can't be given types?...I just noticed the book differs from the website I viewed that listed move() as a method for Actor. The book omits what was on the website. I just am confused why Greenfoot would allow me to add the others (besides height) and have a subclass for the Actor but it cant move. I'm very new to all this obviously so please forgive my confusion.

OR Am I on the some what right path?

The problem is that the 'move' method provided by the Actor class has the signature 'move(int)' while the one in the Animal class has the signature 'move()'. You can use 'move(int)' from any Actor subclass (including the Animal class) because that method is defined in the Actor class; for the same reason, you can only use 'move()' from any subclass of Animal (or from the Animal class itself, since it is an editable class).