Hi @rnasrah,
You're looking at the distance between timepoint 1 and timepoint 2 for each of the groups. When i look at it, the time 1 and time 2 are more similar (smaller distance) in group A than in group B. It looks like group c is in the middle. You've got a significant difference in the change over time (distance between 1 and 2) between groups A and B but not C.
Best,
Justine