I think it’s 75% I’m so sorry if it’s wrong
        
             
        
        
        
Answer:
When a single amino acid is encoded by more than one codon.
Explanation:
Degeneracy is when a single amino acid is encoded by more than one codon. This pehonomenon was first described by Lagerkvist where there are more codons than amino acids that could be encoded.
 
        
             
        
        
        
Answer: the first one 
Explanation: the rest are very wasteful :)