Which characteristic best represents the grassland ecosystem?

least biodiversity
smallest amount of rainfall
well-suited for food production
good supply of building material

The characteristic that represents the best the grassland ecosystem is:

Well-suited for food production

Explanation:

The factors that make the grassland ecosystem well-suited for food production are:

First, it is plain in its majority. Grassland ecosystems are characterized by having great amounts of uniform earth without forests. Second, they are also very rich in life. Grassland ecosystems might not have many bushes or trees but they do have a large amount of diversity in its species. Third, it is perfect for rain distribution. Thanks to its flat land water distribution from rain widen easily and can be guided without much work of the land.

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explanation:

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.