Step 1:
Ubhayālaṅkāra possesses qualities of both sound and meaning ornamentation.
Step 2:
Śleṣa creates beauty through multiple meanings and phonetic expression simultaneously.
Step 3:
Anuprāsa is mainly Śabdālaṅkāra, while Upamā and Utprekṣā are Arthālaṅkāras.
Step 4:
Therefore, the correct answer is:
\[
\boxed{\text{(2) Śleṣa}}
\]