instruction:
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.
question:
Question: Simon was digging in his yard and found that the rocks that were shallower in the ground, compared to the surface rocks, were likely 
 Answer: younger
answer:
Therefore, deeper rock layers must be older than layers closer to the surface.


question:
Question: Jeff noticed the food supply changed over time in his city. The advent of farming machines likely caused the food supply to 
 Answer: increase
answer:
Better farming techniques and machines increased the food supply and the distribution of food.


question:
Question: Milo operates a greenhouse for profit. One day he turns down the humidity controls. What will happen to the rate of transpiration of the plants in the greenhouse? 
 Answer: increase
answer:

As humidity increases, the water potential gradient across the inside and outside the leaf become more equal, and so the rate of transpiration decreases.