Final answer:
In Spanish, the verb estar would be used to express the temporary state or condition of being tall.
Step-by-step explanation:
In Spanish, the verbs ser and estar are both used to express the concept of 'to be' but they are used in different contexts. The verb ser is used to talk about inherent qualities or characteristics, while estar is used to talk about temporary states or conditions. In the sentence 'I am tall,' the word 'am' refers to a temporary state rather than an inherent characteristic, so the correct conjugation would be estar.
Learn more about Verb conjugation in Spanish