TASK DEFINITION: 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.
PROBLEM: Question: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by _____ greenhouse gas levels. 
 Answer: decreased

SOLUTION: As greenhouse gases increase, changes will be more extreme.

PROBLEM: Question: More oxygen absorption means _____ oxygen in the blood. 
 Answer: more

SOLUTION: 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.

PROBLEM: Question: If the Sun were closer to the Earth than the Moon, which body's gravity would have less influence on Earth? 
 Answer: Moon

SOLUTION:
Even though the Sun is much larger than the Moon, the pull of the Suns gravity is much less because the Sun is much farther away.