How is the worlds human settlement affected by the uneven distribution of resources

What is an example of a line segment

Ahis which describe the horizons in a soil profile? check all that apply. horizon a is mineral deficient. bedrock lies below the soil layers. te horizon o forms from organic material, horizon b undergoes the least amount of change. horizon c is least affected by the soil formation process.

Identify the youngest layer in the figure ( have to click one letter)