Fact 1: When metal conducts heat , that metal expands.

Fact 2: Aluminum's classification is other metals.

Given the two facts above, answer the question "What does aluminum do when it heats up?" with the following options: 
- sleeps
 - support
 - naps
 - squeeze
 - expands
 - moves
 - Bend
 - corrodes


 

     expands    