Option 1 -> Bountiful means generous and giving in large amounts, directly synonymous with munificent.
Option 2 -> Penurious means extremely poor or stingy, the opposite of munificent.
Option 3 -> Salacious means having excessive interest in sexual matters, unrelated to generosity.
Option 4 -> Virtuous means morally excellent, but doesn't specifically convey generosity.
Hence, Option 1: Bountiful -> Munificent describes someone who is extremely generous and liberal in giving, and bountiful carries the same meaning of giving freely and abundantly -> correct