Final answer:
Both Ukraine and China have fertile and ample water resources to support large populations due to their geographic features.
Step-by-step explanation:
Both Ukraine and China have fertile and ample water resources to support large populations.
Ukraine is known for its fertile black soil that generates a significant portion of the overall Soviet agricultural output, providing substantial quantities of food to other Soviet republics.
China, on the other hand, has densely populated fertile river valleys that create excellent farmland for food production to fuel its large population.
These countries have geographic features that contribute to their agricultural productivity and ability to sustain large numbers of people.