This is how to conjugate the verb ESTAR (which means to be) in the present tense:
yo estoy, tu estás, el/ella/Usted está, nosotros estamos, vosotros estáis, ellos/ellas/Ustedes están.
Your sentence is I am home. In Spanish, the word YO stands for I in English. This means that you would use the form estoy in your example.
The correct answer is B. estoy.
If they have an a at the end, it is a feminine pronoun
The anser is corazon.
Hope this helps.<3
Have a great day!
*Así* is the correct way to write this word. *Hací* Is a barbarism and, therefore, it is convenient to avoid it.
La respuesta es quinceanera