Which is the correct definition of term foot as it used in poetry?

A foot in poetry refers to a repeating pattern of stressed and unstressed syllables. It is the basic unit of meter, which is the rhythmic structure of a poem. Different types of feet have different names based on the number and arrangement of stressed and unstressed syllables. For example, an iamb is a foot consisting of an unstressed syllable followed by a stressed syllable, while a trochee is a foot consisting of a stressed syllable followed by an unstressed syllable.