Task: Explanation
Input (English): 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 easier? 
 Answer: hard shell
Output (English): 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.