Answer: B. lines containing five beats with a repeated pattern of weak and strong.
Explanation: a iambic pentameter is a type of metric line used in traditional English poetry and verse drama that consists in a line of verse with five metrical feet, each consisting of one short (or weak) syllable followed by one long (or strong) syllable. So from the given options, the one that represents the correct definition for the term "iambic pentameter" is the corresponding to option B.
