Question

the metaphysical poet's introduced various changes in the language of love poetry as a reaction to some norms of Elizabethan poetry. What were the metaphysical poet's reacting against

Answer 1

The metaphysical poets aimed to change the high-flown language of Elizabethan poetry. They were reacting against the flowery language Elizabethan poets used.

Flowery language means that a language contains long, literary expressions.