The correct answer is B. Subsoil
Step-by-step explanation:
Soil is divided into multiple layers or horizons, this includes the topsoil that is the surface layer we know, this layer is dark and in it, it is possible to find plants including its roots and animals such as worms. This is the darkest layer show in the picture. This layer is followed by the subsoil which is lighter in color and harder, this is the lighter-colored band of the picture and the correct answer. Finally, is the bedrock and other layers made of rock that is usually gray, also this layer is the hardest one.