The basic structure of a verse or lines in a verse is

meter.

rhyme.

rhythm

The answer is meter. the meter is the basic structure in poetry. the meter often counts the number of rhythm. The pattern of beats are often measured in foot. There are different kinds of meter in poetry, The kinds of meter are very distinct in terms of accentuation.

The basic structure of a verse or lines in a verse is called a meter. Meter in poetry indicates the pattern of the beats or the certain number of syllables in each verse. The syllables can either be accented (stressed or long) or unaccented (unstressed or short).