Final answer:
'Ser' is the appropriate verb to use when describing what someone or something was like, as 'ser' is used for permanent or long-lasting attributes, characteristics or qualities.
Step-by-step explanation:
The correct verb to use when you're summing up what someone or something was like is the verb ser. The verb ser is used to describe permanent or long-lasting attributes, characteristics or qualities, including physical characteristics, personalities, professions, and time. On the other hand, estar is used to describe temporary states or locations. For example, to say 'He was a good person.
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