instruction:
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
question:
Question: As Peter's dog got smaller, the dog's bones became 
 Answer: smaller
answer:
As animals grow their bones get longer and bigger, they grow more hair, and are able to take care of themselves by getting food, shelter, and water.


question:
Question: If Mona is comparing two organisms and she notices that one has a very hard shell and one has a very soft shell, which one will turn into a fossil less easier? 
 Answer: soft shell
answer:
Hard shells fossilize more readily than soft bodied organisms, as they are better at resisting decay, take significantly longer to break down, and have a greater chance of surviving burial under layers of sediment.


question:
Question: If Mary is building a rocket and she wants it to fly as high as possible, what should she do to the mass of the rocket? 
 Answer: decrease it
answer:

By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.