Final answer:
The verb estar is used to talk about conditions that are not permanent.
Step-by-step explanation:
The verb estar is used to talk about conditions that are not permanent. It is used to describe the temporary state or condition of someone or something. Examples of using estar include expressing location, feelings, health, and temporary characteristics.
For instance, you can use estar to say "Estoy enfermo" which means "I am sick." In this case, the condition of being sick is temporary, not permanent.
Therefore, the correct answer is A. conditions that are not permanent.
Learn more about The uses of the verb estar