instruction:
You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
question:
Question: Derek is diving into the ocean. The pressure at the surface will be light, and the pressure the deeper he goes will be 
 Option1: stronger 
 Option2: weaker 
 Explanation: Pressure: Pressure increases with depth, but increased pressure raises the melting temperature, so melting of rock is less likely to occur at higher pressures.
answer:
stronger


question:
Question: Mona is a scientist studying erosion at a university. She is observing a river. If she starts taking erosion measurements at the mouth of the river and moves up to the head of the river, what will she find happens as the slope gets steeper? 
 Option1: erosion decreases 
 Option2: erosion increases 
 Explanation: Water flowing over a steeper slope moves faster and causes more erosion.
answer:
erosion increases


question:
Question: Jefferson built a farm machine to increase food production. This likely will cause the population's lifespan to 
 Option1: increase 
 Option2: decrease 
 Explanation: New farm machines were invented. They increased the amount of food that could be produced. With more food, people were healthier and could live longer.
answer:

increase