Final answer:
Falsetto voice is a vocal register that is usually associated with male singers but can also be produced by females and children. It is characterized by a higher pitch than the singer's normal modal voice. The correct answer is (b) Males, as it is most commonly utilized by them in a range of musical genres.
Step-by-step explanation:
The "falsetto voice" is a vocal register that lies above the modal voice register and overlaps with the lower part of the whistle register. It is produced by the vibration of the ligamentous edges of the vocal cords, in whole or in part, and is typically associated with male singers, although females and children can also produce falsetto to some extent. However, it is most prominent in males due to the significant difference in their vocal range in comparison to their modal voice.
When falsetto is employed, the singer's voice sounds notably higher than the normal modal voice register. This is because the vocal folds lengthen and become thinner, allowing them to vibrate more quickly. Men who sing in their falsetto register can reach into higher frequency ranges similar to those of women's voices. The use of falsetto is common in many genres of music including opera, pop, and traditional music.
Therefore, the general belief that falsetto voice is only produced and used by males (option b) is correct, in the context that it is more commonly recognized and utilized substantially in male singing. However, this does not imply that females and children are incapable of producing falsetto; it is simply less common or used differently in the context of their voice types.