Select the most appropriate option to fill in blank no. 2.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. combines.
The sentence talks about a "musical fountain" that uses water, colored lights, and recorded music controlled by a computer for dramatic effects.
The subject "musical fountain" is singular, so we need a verb form that agrees with it.
Given the context, the correct verb form to use is "combines" to match the singular subject "musical fountain."