Final answer:
The metrical foot used in line 1, as well as one of the options mentioned, is the iamb.
Step-by-step explanation:
The metrical foot used in line 1, as well as one of the options mentioned, is the iamb. An iamb is an unstressed syllable followed by a stressed one. In line 1, the stressed syllable falls on the word 'tolls', while the unstressed syllables fall on 'the' and 'of'.