read the paragraph. then, add the best topic ...
read the paragraph. then, add the best topic sentence. like a regular pipe organ, the wave organ has many pipes of different lengths. however, the wave organs pipes go down into the water of the san francisco bay. as waves crash into the organ, the pipes make loud, echoing sounds. when water enters a pipe, it makes a higher sound. when water leaves the pipe, it makes a lower sound. there are many different kinds of musical organs. san franciscos wave organ turns the sounds of the ocean into music. the san francisco bay is sixty miles long.
Answer
# Brief Explanations:
The paragraph focuses on the Wave Organ in San Francisco Bay and how it makes sounds from ocean - wave interactions. The first option is too general about musical organs. The third option is about the length of the bay and not related to the Wave Organ's function. The second option specifically ties the Wave Organ to turning ocean sounds into music, which is the main idea of the paragraph.
# Answer:
San Francisco's Wave Organ turns the sounds of the ocean into music.