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.

Example Input: Question: Jim's skin was noticeably darker than his friend Matt's skin. This means that _____ produces more melanin. 
 Answer: Jim
Example Output: However, the melanocytes of people with darker skin produce more melanin.

Example Input: Question: Air pressure is higher in the 
 Answer: valleys.
Example Output: Air pressure is less at higher elevations.

Example Input: Question: Karly is studying two rivers and how they are affecting the rock around them. If the 2nd river she looks at is half as big as the first river she is studying, then Karly would expect to see _____ erosion caused by the 2nd river. 
 Answer: less
Example Output:
The bigger the waves are and the more sediment they carry, the more erosion they cause.