Taking home ice blocks

This task is about ice blocks.
illustration: ice block
 

Question 2Change answer

     Mum decided to take home some ice-blocks from the supermarket.
     The packer wrapped the ice-blocks in newspaper so they would not melt.
 
a)  Describe how this helped stop the ice-blocks from melting.

Question

b)  Wrapping the ice-blocks so they won't melt is called ...

    • evaporation

    • reflection

    • insulation

    • dehydration