Give an example of an amino acid being coded for more than one codon

Many of the amino acids are coded for by more than one codon. Examples are:

1. Isoleucine  - ATT, ATC  and ATA

2. Leucine -  CTT,CTC,CTA CTG, TTA and TTG.

3. Valine - GTT, GTC, GTA and GTG.

4. Phenylalanine - TTT and  TTC.

5. Cysteine - TGT and  TGC

6. Alanine - GCT, GCC and GCG

7. Glycine - GGT, GCC, GGA and GGG.

8. Proline - CCT, CCC, CCA and CCG.

9. Threonine - ACT, ACC, ACA, and ACG.

10. Serine - TCT, TCC, TCA, TCG, AGT and AGC. 

what are the options? add them, then i will be glad to .

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.