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. 'T<u>o</u> him wh<u>o</u> in the l<u>o</u>ve <u>o</u>f Nature h<u>o</u>lds' employs this pattern of five pairs of unstressed syllable followed by a stressed one. Hence, <u>option C</u> is the correct answer.