1. Rice is produced mostly in:

temperate grasslands.
monsoon climate regions.
rainforests.

2. Citrus fruits are produced especially in:

rainforests.
grasslands.
Mediterranean climate regions.

3. Tropical cultivated plants include:

sugar cane and oil palm.
corn and cotton.
wheat and barley.

4. The world's largest exporter of agricultural products is:

China.
Russia.
the United States.

5. The most common plant-based fabric fiber is:
cotton
linen
hemp

6. The amount of agricultural production on Earth has:

decreased.
increased.
not changed.

7. Coffee and tobacco are examples of:

cultivated plants that are not used as food.
biofuels.
new food crops.