Girl we need some more context then this
Answer : the schwa
The schwa is the term given to the symbol that indicates the indeterminate vowel sound. It is also considered as the unstressed central vowel in the International Phonetic Alphabet (IPA). The schwa is also one of the most commonly misunderstood sound in the English alphabet and are known as the lazy vowels. A lot may have heard about it but only a few knows that it is the most common unaccented syllables or words in the English dialect.
A functional text is a text which helps us to do something such as cook a recipe, assemble a piece of furniture etc. The approach in learning from such text could be relying on headings and graphics to see what are the steps from the headings and the graphics to show us how to put things together with a picture for example.