Choose one of the arrows and explain how the factors are related, causing the sign that is shown on the diagram

1. "Land under cultivation" leads to food production with a + sign because more land being used to produce food will increase food production.

2:

I'm not sure if I did these right. I looked at the loop that the "loop" symbol was in and followed arrows back to one of the variables in the loop, even if it brought me into another loop. Then I counted the negative signs in that loop. Then I looked at the loop again and decided if it make sense as reinforcing or balancing not based on the negative signs I counted. Sometimes that didn't match up so I chose based on what made sense. Would love some feedback from others on how they did this (get it, feedback... lol).

Loop 1: Positive, I counted 2 (-)'s. So it'd be reinforcing because the more we increase land under cultivation the more we'll increase climate change and greenhouse gases which lowers food production. Then we'll need more food still and try to cultivate more land and keep going through the loop. 

Loop 2: Negative. If food production decreases, prices increase, and the land under cultivation decreases, so food production decreases. 

Loop 3: Positive. If we increase food production, food prices are lower, so we increase intensity of production to be able to sell more to make more money which increases food production. Increased food production lowers price more and reinforces the loop.  

3. "Demand for food" could have an arrow to "land under cultivation" with a plus sign because the more food we'll need the more land we'll need.