Question

4/10 what is chernozem? black earth with fertile soils a type of mineral deposit a river in germany a transportation tunnel

Explanation:

Chernozem is defined as a type of black soil that is highly fertile, rich in humus and nutrients, typically found in regions like the Russian steppes. The option "Black earth with fertile soils" matches this definition. The other options (mineral deposit, river in Germany, transportation tunnel) are incorrect as they don't relate to the soil - related nature of chernozem.

Answer:

A. Black earth with fertile soils