Answer:It shows the size of the range of the moisture contents at which the soil remains plastic. In general, the plasticity index depends only on the amount of clay present. It indicates the fineness of the soil and its capacity to change shape without altering its volume.
I believe it would be D a change in direction of motion
24- series
25- parallel
26- no, because they’re connected in series
27- yes, because they’re connected in parallel