Answer:
The correct verb in the sentence is:
- Ella trabaja mucho y <u>está</u> cansada.
Explanation:
The verbs <em>"ser"</em> and <em>"estar"</em> in Spanish are actually different, unlike English where the verb be includes both, The verb <em>"ser"</em> <u>is used to mention what is a person, how his/her name, profession and others qualities and abilities</u> that can have each one, while the verb <em>"estar"</em> <u>is used to mention where is a person (a place) or how is he/she (mood or feelings)</u>, reason why in the sentence which translation is below:
- She works hard and <u>is</u> tired.
The right use must be the second with the verb <em>"estar"</em>, its conjugation in Present is:
- <em>Yo </em><em>estoy</em><em>.</em>
- <em>Tú </em><em>estás</em><em>.</em>
- <em>Él </em><em>está</em><em>.</em>
- <em>Ella </em><u><em>está</em></u><em>.</em>
- <em>Ello </em><em>está</em><em>.</em>
- <em>Nosotros </em><em>estamos</em><em>.</em>
- <em>Ellos </em><em>están</em><em>.</em>
How the personal pronoun used in the sentence is "she" or <em>"ella"</em> in Spanish, the applied conjugation is <u><em>"está."</em></u>
