What does Gupta say is the most beneficial aspect
of mandatory community service?

answer; i do believe that the correct answer is ( portal of exit in the chain of transmission); good luck

answer; i believe the correct answer is (secondary prevention);

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.

i agree d is most definitely correct!