Fact 1: When a cooler object touches a warmer object , thermal conduction occurs.

Fact 2: Thermal conductivity also increases with compaction.

Given the two facts above, answer the question "conduction is increased with what?" with the following options: 
- Time and energy
 - compaction
 - blood
 - evaporation
 - voltage
 - heat energy
 - motion
 - sweating


 

  compaction       