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.

[EX Q]: Question: Willard dug up a rock from near the surface, and realized it was _____. 
 Answer: young
[EX A]: Therefore, deeper rock layers must be older than layers closer to the surface.

[EX Q]: Question: When it becomes less humid outside people are _____ to sweat. 
 Answer: less likely
[EX A]: As humidity increases, the water potential gradient across the inside and outside the leaf become more equal, and so the rate of transpiration decreases.

[EX Q]: Question: Hassan and Ratna each received new automatic cameras as presents. To test their new cameras, Hassan took a picture of the beach that afternoon, while Ratna waited until it was dark outside to take a picture of a python in the moonlight. The shutter of whose camera stayed open longer? 
 Answer: Ratna
[EX A]:
A camera shutter stays open longer in dim light to let more light in.