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.

Q: Question: Less oxygen absorption means _____ oxygen in the blood. 
 Answer: less

A: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.
****
Q: Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The light cart, compared to the heavy one, will accelerate 
 Answer: quickly

A: The greater the mass of an object, the less it will accelerate when a given force is applied.
****
Q: Question: What happens to John's risk of contracting a disease when he is younger? 
 Answer: it decreases

A:
The older a person is, the greater their chance of developing a cardiovascular disease.
****