Question

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Explanation:

Analyze the first poetic line

The line is: "Because their words had forked no lightning they" (from Dylan Thomas's "Do not go gentle into that good night").
Syllable and stress breakdown:
Be-CAUSE / their WORDS / had FORKED / no LIGHT- / ning THEY
This consists of 10 syllables with 5 repeating unstressed-stressed (iambic) feet.
Meter: Iambic pentameter.

Analyze the second poetic line

The line is: "A lonely impulse of delight" (from W.B. Yeats's "An Irish Airman Foresees His Death").
Syllable and stress breakdown:
A LONE- / ly IM- / pulse OF / de-LIGHT
This consists of 8 syllables with 4 repeating unstressed-stressed (iambic) feet.
Meter: Iambic tetrameter.

Analyze the third poetic line

The line is: "No likely end could bring them loss" (from W.B. Yeats's "An Irish Airman Foresees His Death").
Syllable and stress breakdown:
No LIKE- / ly END / could BRING / them LOSS
This consists of 8 syllables with 4 repeating unstressed-stressed (iambic) feet.
Meter: Iambic tetrameter.

Answer:

Question 1

"Because their words had forked no lightning they": iambic pentameter

Question 2

"A lonely impulse of delight": iambic tetrameter

Question 3

"No likely end could bring them loss": iambic tetrameter