Fact 1: Cells have multiple repair mechanisms to fix mutations in DNA.

Fact 2: DNA damage is called mutation.

Given the two facts above, answer the question "Cells have multiple repair mechanisms to fix what?" with the following options: 
- scarce resources
 - harmful substances
 - damage in DNA
 - critical organs
 - the skin
 - Veins and arteries.
 - layers of fat
 - heat or cold


 

   damage in DNA      