Final answer:
Circles above letters in English are called "vowel markings" or "diacritical marks" and are used to indicate pronunciation or accent.
Step-by-step explanation:
In English, circles above letters are typically called "vowel markings" or "diacritical marks." These marks are used to indicate the pronunciation or accent of a particular letter.
For example, in the word "behind," the circle above the letter 'i' represents the short vowel sound /ɪ/. In the word "itself," the circle above the letter 'i' represents the long vowel sound /aɪ/. And in the word "wonderful," the circle above the letter 'u' represents the schwa sound /ə/.