You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
--------
Question: Paragraph: At higher elevations, there is less air to press on a given area.
Question: When we get to the bottom of a mountain the air is
Choices: A)more dense
B)less dense

Answer: more dense

Question: Paragraph: More pollutants mean poorer air quality.
Question: When a river gets emptied of a lot of waste chemicals it becomes
Choices: A)cleaner
B)dirtier

Answer: cleaner

Question: Paragraph: Therefore, water nearer shore usually contains more dissolved nutrients than water farther from shore.
Question: Water furthest away from shore will have _____ dissolved nutrients than water near shore.
Choices: A)more
B)less

Answer:
less