Option 1 -> "Active" means energetic or busy, but doesn't capture the brave and noble quality of "gallant."
Option 2 -> "Intelligent" refers to being smart or clever, which is unrelated to the heroic and courageous nature implied by "gallant."
Option 3 -> "Stalwart" means loyal and dependable, emphasizing strength and reliability rather than the noble bravery conveyed by "gallant."
Option 4 -> "Honourable" means showing high moral standards and nobility, which aligns with the courageous and chivalrous nature of "gallant."
Hence, Option 4: honourable -> "Gallant" describes someone who displays noble bravery and chivalrous behavior, particularly in heroic situations like risking one's life to save others. "Honourable" best captures this sense of moral nobility and courageous character demonstrated by the firefighter's selfless action. -> correct