What becomes less sensitive and increases your chances of chronic hypohydration as you get older?
a. your eyesight
b. your sense of touch
c. your thirst mechanism
d. your internal thermostat

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.