A. In Photo Y, the grain crop shown is rice. In Photo Z, the grain crop shown is wheat.
B. One economic difference between subsistence agriculture and commercial agriculture is that subsistence agriculture is meant to feed the farmer’s family while commercial agriculture is meant for sale at a market. This means that people participating in subsistence agriculture don’t gain money while commercial agriculture’s goal is to gain money.
Another economic difference is that subsistence agriculture tends to use less mechanized equipment, technology, or expensive high-yield seeds and so requires less capital to start doing. Meanwhile, commercial agriculture tends to use mechanized equipment, technology, and high-yield seeds and require large amounts of capital, usually from a bank, to start.
C. One environmental impact resulting from the type of agriculture in photo Y is that it may result in flooding. As wet rice farmers flood their fields in order to grow rice, this may result in flooding in the nearby environment.
D. One environmental impact resulting from the type of agriculture in photo Z is that it may result in monocultures where only one crop is grown year after year which results in depletion of soil nutrients and decreases future crop yields.