What is an iambic foot?
a. a poetic foot made up of an unstressed syllable followed by a stressed syllable
b. a poetic foot made up of a stressed syllable followed by an unstressed syllable
c. a poetic foot made up of two stressed syllables followed by an unstressed syllable
d. a poetic foot made up of two unstressed syllables followed by a stressed syllable

A. a poetic foot made up of an unstressed syllable followed by a stressed syllable.

Explanation: In poetry, an iamb is a foot or beat consisting of an unstressed syllable followed by a stressed syllable, or a short syllable followed by a long syllable, iambic foots were used in traditional traditional English poetry and verse drama. So, according to this information, the correct answer is the definition given by option A:  a poetic foot made up of an unstressed syllable followed by a stressed syllable.

c) vampires in history and modern life.

ah, shun the horrid gulf! by scylla fly.