Final answer:
Phonology is the subfield of linguistics that deals with the study of sound patterns in a particular language or languages. It focuses on the organization and use of sounds in a linguistic system.
Step-by-step explanation:
In linguistics, issues pertaining to letters and sounds are a matter of phonology. Phonology is the subfield of linguistics that deals with the study of the sound patterns of a particular language or languages. It focuses on the organization and systematic use of sounds in a linguistic system. In the case of the Coca-Cola Company developing its Dasani bottled water brand, linguists guided the naming process by choosing the recurring 'a' sound because it has a soothing quality.