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: When there are fewer people in an area the amount of water will 
 Answer: increase

SOLUTION: The availability of water is projected to get worse as demand increases.

PROBLEM: Question: Dean found a leaf with a sheen and a leaf that did not have one. Which leaf is less reflective? 
 Answer: the leaf with no sheen

SOLUTION: Increases the sheen on leaves to make them more reflective.

PROBLEM: Question: If John decreases the rate at which gas exits the bottom of his rocket, what will happen to the upward momentum of the rocket? It will 
 Answer: decrease

SOLUTION:
The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.