Which best describes the primary wavelengths of radiation emitted by earth’s surface?

How would i answer this for an exam?

Which numberline shows the solution to n -3

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.