Question 3

The piano tuner tightened the string on the piano, thus increasing the string's tension.

Tightening a piano string raises its tension, which is essential for producing the correct pitch. This adjustment is a fundamental part of piano tuning.

A) tension

This option is correct because tightening a string directly increases its tension. Higher tension results in a higher pitch, which is why piano tuners adjust the strings in this manner to achieve the desired sound.

B) length

This option is incorrect as tightening a string does not change its length. The string's length remains constant during tuning; it is the tension that is being altered to adjust the pitch.

C) volume

This option is also incorrect. While increased tension can affect the volume to some extent, the primary focus of tightening a string is to adjust its pitch rather than directly increasing its loudness.

D) strength

This option is incorrect as well. Although a string may seem stronger when under higher tension, the term "strength" is not applicable in the context of tuning. The increase in tension does not inherently change the material strength of the string itself.

Conclusion

The correct answer is definitively A) tension because it directly relates to the effect of tightening a piano string, which alters pitch. The other options do not accurately describe the impact of this action, as they either misinterpret the mechanics of string behavior or address unrelated concepts.