All of the following are responses to external stimuli in the passage EXCEPT - * hiding in a tree hole
animals returning to their homes
the mountain hare's white fur
winter's arrival

The plates kept rubbing together

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.

He should put sand around the spill in order to contain it so that it won't spread

Telophase colchicine is a chemical obtained from plants that prevents the assembly of spindle fibers