Let's analyze each option:
(1) BLAST:
BLAST is a tool used to compare nucleotide or protein sequences and find similarities. It is not used specifically for motif identification. Hence, this is not the correct answer.
(2) COPIA:
COPIA is a tool used for motif identification and analysis. This is the correct answer.
(3) PROSPECT:
PROSPECT is used for predicting protein secondary structures, not for motif identification. Hence, this is not the correct answer.
(4) FASTA:
FASTA is used for sequence alignment and searching, but it is not used for motif identification. Hence, this is not the correct answer.
Conclusion:
The correct answer is Option 2: COPIA, which is designed specifically for motif identification.