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: 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: If Mary increases the resistance of her electrical circuit, what will happen to the current in that circuit? 
 Answer: decrease
answer:
We can say that resistance and current in an electric circuit areinversely proportional, because as the one increases, the other decreases, and vice versa.


question:
Question: Do gas engine cars pollute more or less than electric engine cars? 
 Answer: more
answer:

Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.