Answer:
what was the activity you did
They swam faster and learned to hide
You need to know 1) How much kinetic energy it absorbed before it broke.
2) What materials are able to scratch it.
3) Its mass.
Fixator (--) helps hold a bone in place
Usually if your pulse rate is thumping at a fast pace that means you have been running or your body has been actively moving in some type of way.