Answer:
Well, irritable means you are like grumpy. Short tempered means you get made easily always, like a short fuse! It depends on what and why you need it. The less "harsh" term is irritable. The more harsh term is short tempered.
Explanation:
To put it in a better view, when you are grumpy, or irritable, when you are hungry or sleepy, you get mad or frustrated quickly. But, when you are short tempered, you have trouble keeping your anger down. This is when you have a "short fuse"  they like to say. Now these may look similar, but they are much different. The only common thing is you get angry, or upset real easy. The causes are much different. However, you can prevent one, irritable, by getting the right sleep, and eating a balanced meals! Sometimes you need practice or a counselor most of the time when dealing with a short temper . Not always though, friends could also help, along with family!
 
        
                    
             
        
        
        
1. Yes they both become different people on the outside and on the inside.
2. I believe so because Colin used to be so frail on the outside and now he is walking and can do basic things by himself. Also on the inside he is different because her not always crying and plus he is starting to care about himself and others. Now he believes he has a reason to be on the earth. Mary changed physically because she is not so skinny and bony like. She changed on the outside because she wasn't so "cold" she is now caring and not so spoiled. She also learned to dress herself and not let a maid or servant do it for her. 
Can you please press the heart button aka the thanks button so I can gain 10 points because this took me a long time to write. Enjoy the rest of your day :)
        
                    
             
        
        
        
I think it is line 4 (since it repeats granite twice) Hope this helps!