Question

as climate change continues to occur at a greater magnitude in the 21st century, scientists predict that crop yield for corn, a major agricultural crop in the united states, will decrease by as much as 20%. which argument accurately supports the statement that corn production and yield will decrease due to climate change?

overall cooler temperatures will reduce the root and leaf growth for crops, which will decrease the photosynthesis ability on the part of the plant

overall warmer temperatures will increase evaporation rates and could promote greater droughts in areas where farmland is a major land use.

overall warmer temperatures will extend the growing season for plants in the middle of the country where many of the crops are grown.

overall cooler temperatures will reduce the growth of the crops due to competition with other plant species in the area where they are being grown

Explanation:

• Option 1: Climate change is associated with overall warmer temperatures, not cooler. So this option is incorrect.
• Option 2: Warmer temperatures increase evaporation. In farmland - dominant areas, this can lead to droughts. Droughts reduce water availability for corn, decreasing yield. This is a valid argument.
• Option 3: Extending the growing season (if there is enough water) could potentially increase yield, not decrease it. So this option is incorrect.
• Option 4: Again, climate change is about warmer temperatures, not cooler. So this option is incorrect.

Answer:

Overall warmer temperatures will increase evaporation rates and could promote greater droughts in areas where farmland is a major land use.