Fact 1: Athermal insulator slows the transfer of heat.

Fact 2: Convection is the transfer of heat in fluids.

Given the two facts above, answer the question "A thermal insulator does what to the convection in fluids?" with the following options: 
- motion
 - good
 - disposes of
 - slows
 - speeds
 - expand
 - reduce
 - maintains


 

    slows     