Answer: In contrast, I and I are quite close phonetically; they only differ in vowel length and share the same vowel quality in all four dimensions height, blackness, rounding, and tenseness. Strong evidence that I and I are allophones of the same phoneme comes from complementary distribution and phonetic similarity taken together. Two phones that are in contrastive distribution are allophones of separate phonemes, which is a significant outcome of phonology. However, as we can see in this example, if two phones areincomplementary distribution, they may be allophones of the same phoneme or a distinct phoneme, as in the case of and [] or I and I Another essential phonological skill is the ability to distinguish between which and which. This crucial sentence will appear frequently in the following several units. It implies that the locations of the allophones don't overlap: Following voiceless stops, we occasionally observe voiceless [l], but never elsewhere, and we never observe voiced [l] there. Similar though voiced [l] is seen frequently in many settings, voiceless [l] is never seen in any of those settings. When complementary distribution is present, it is a strong indicator that the two segments under consideration are allophones of the same phoneme. Can you think of any further instances of complementary distribution in English phonetic segments Consider the consequences of transcribing voiceless stops Step by step explanation: Approach to solving the question:This crucial sentence will appear frequently in the following several units. It implies that the locations of the allophones don't overlap: Following voiceless stops, we occasionally observe voiceless [l], but never elsewhere, and we never observe voiced [l] there. Similar though voiced [l] is seen frequently in many settings, voiceless [l] is never seen in any of those settings Detailed explanation:Following voiceless stops, we occasionally observe voiceless [l], but never elsewhere, and we never observe voiced [l] there. Similar though voiced [l] is seen frequently in many settings, voiceless [l] is never seen in any of those settings. When complementary distribution Examples:However, as we can see in this example, if two phones areincomplementary distribution, they may be allophones of the same phoneme or a distinct phoneme, as in the case of and [] or I and I Another essential phonological skill is the ability to distinguish between which and which Key references:Fasold, R. W., & Connor-Linton, J. (Eds.). (2014). An introduction to language and linguistics. Cambridge university press.