Material applied to land to lower the acidity of soil. · sand
· silt
· clay
· lime

Agricultural Limestone or Lime

Explanation:

Limestone is used to lower the acidity of the soil because soil become acidic due to calcium and magnesium leaching out, because hydrogen is added to soils by decomposition of plant residues and organic matter, or because nitrification of ammonium occurs. Depends on how your studying it.

probably 3 since archeologists and historians don’t understand there writing.

answer; calendar;