Option 1: The frequency range of 0-200 Hz is not sensitive to human ears. This range is lower than what humans can typically hear. Humans hear sounds in the range of 20-20,000 Hz, so this option is incorrect.

Option 2: The frequency range of 20-20,000 Hz is sensitive to human ears. This is the range in which most sounds that humans can hear fall. Sounds below 20 Hz are considered infrasound and are typically felt rather than heard. Sounds above 20,000 Hz are considered ultrasound and are also outside the range of human hearing. Therefore, this option is correct.

Option 3: The frequency range of 200-20,000 Hz only is too narrow. It excludes sounds below 200 Hz, which are also audible to humans. Therefore, this option is incorrect.

Option 4: The frequency range of 2,000-20,000 Hz only is a narrower range than the full range of human hearing. It excludes sounds below 2,000 Hz, which are still within the audible range. Therefore, this option is incorrect.

In summary, option 2, which includes the frequency range of 20-20,000 Hz, is the correct answer as it