What devices did people use to store information in pre industrial age?​

Witch layer of the atmosphere has the most air pressure

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.

Countries trade with each other because resources are not evenly distributed across the globe. true or false