Concept:Mulching is the practice of covering the soil surface to improve its condition and crop growth.
Explanation:Mulch blocks sunlight, so it discourages weed growth and controls weeds.
Mulch reduces water loss by evaporation, so it conserves soil moisture.
Mulch usually keeps soil temperature steady or cooler, not generally higher.
Mulch does not directly reduce soil pH, as it mainly affects moisture and temperature.
Hence, the correct advantages are I and II only.
Answer:A. I and II only