Which line of poetry is written in lambic pentameter?

C). "To him who in the love of Nature holds. "

Explanation:

Iambic pentameter is defined as the poetic meter that consists of a line with five metrical feet in each of which the iamb(metrical foot in verse consisting of an unstressed syllable followed by a stressed syllable) is dominant. Among the given options, the third option i.e. 'To him who in the love of Nature holds' employs this pattern of five pairs of unstressed syllable followed by a stressed one. Hence, option C is the correct answer.

faithful servants eumaeus and philaetius:

his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed:

these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.