What sound is represented by the symbol "θ"?

The symbol "θ" represents the voiceless dental fricative sound typically associated with the "th" in the word "three." This sound is produced by placing the tongue against the upper teeth and allowing air to flow through, creating a friction-like sound. This is a distinctive sound in English and serves to differentiate words, making it crucial for clear communication.

In contrast, the other options represent different sounds. For example, "θ" is not the sound found in "feather," which contains a voiced fricative ("ð"), nor does it correspond to the "sh" sound in "shoe," which is represented by the symbol "ʃ." Similarly, "zh" as in "garage" corresponds to a voiced fricative sound ("ʒ"), which is also distinctly different from the "θ" sound. Thus, identifying "θ" with the sound in "three" helps reinforce understanding of phonetic symbols in relation to their articulation and usage in words.