____ through an old ablum, Alia ____ by some of the photographs.

The correct option, looking, was amused, uses the present participle 'looking' for the ongoing action and the passive voice 'was amused' to show Alia as the recipient of the amusement. Distractors are incorrect because 'amused' (active voice) or 'was amuse' (incorrect verb form) do not fit the context.