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: A hard rock will erode _____ than a soft rock. 
 Answer: slower
The water erodes the softer rock faster than the harder rock.

Question: Henry noticed that his piece of cake was lighter than his piece of butter. The cake was _____ dense. 
 Answer: less
A given volume of a denser substance is heavier than the same volume of a less dense substance.

Question: A small planet has a _____ pull of gravity than a small planet. 
 Answer: weaker

Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.