Explanations:In English, the trigraph 'tch' is a combination of three letters that represent a single sound, specifically the /tʃ/ sound. This trigraph is commonly used after a short vowel sound to indicate that the vowel is pronounced in its short form. For example, in the word "catch," the 'a' is pronounced as a short 'a' sound, and the 'tch' at the end represents the /tʃ/ sound.
Identifying words that contain the trigraph 'tch' is an important skill in spelling and understanding English orthography. The trigraph 'tch' is often used in words where the /tʃ/ sound follows a short vowel, such as in "batch," "fetch," "match," and "catch." It is important to note that the 'tch' trigraph is distinct from the 'ch' digraph, which also represents the /tʃ/ sound but is used in different contexts, such as in "church" or "chase."
When examining the list of words provided, we need to look for words that contain the 'tch' trigraph. The words "snatch," "sketched," and "ketchup" all contain the trigraph 'tch.' In "snatch," the 'tch' is at the end of the word and represents the /tʃ/ sound. In "sketched," the 'tch' is also at the end of the word and represents the /tʃ/ sound. In "ketchup," the 'tch' is in the middle of the word and represents the /tʃ/ sound.
Other words in the list, such as "whine," "photo," "bring," "width," "whirl," "fifth," "rush," "kitchen," "pitcher," "northern," "chef," "chance," "touch," "graph," and "stretching," do not contain the trigraph 'tch.' Some of these words contain other digraphs or trigraphs that represent different sounds, such as 'ch' in "kitchen" and "pitcher," 'th' in "width" and "northern," and 'ph' in "photo."
Understanding the use of the trigraph 'tch' in English spelling helps in recognizing and correctly spelling words that contain this trigraph. It is a useful skill for improving spelling accuracy and understanding the patterns in English orthography.