Yes, we can see a pattern in the lines of 'The Divine Image'. The first line has eight, and the second line has six syllables. The first syllable of each foot is unstressed. The second syllable is stressed because in each foot, one of the syllables is more prominent or more substantial than the other syllable(s), and it is called the strong syllable, termed as the head syllable. The other syllables in the foot are the weak syllables.
A compound (A) with molecular formula $C_4H_9I$ which is a primary alkyl halide, reacts with alcoholic KOH to give compound (B). Compound (B) reacts with HI to give (C) which is an isomer of (A). When (A) reacts with Na metal in the presence of dry ether, it gives a compound (D), C8H18, which is different from the compound formed when n-butyl iodide reacts with sodium. Write the structures of A, (B), (C) and (D) when (A) reacts with alcoholic KOH.