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


[Q]: Question: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by _____ greenhouse gas levels. 
 Answer: decreased
[A]: As greenhouse gases increase, changes will be more extreme.


[Q]: Question: Katie wants to get light to turn to rainbow colors by using a lens to filter the light through. In order to get the most colors, Katie will use a lens that is 
 Answer: curved
[A]:
The more curved the surface of a lens is, the more it refracts the light that passes through it.