Elena b. está en la tienda.
For location, you should use the verb estar, so that rules out options B, es, and D, son, as they are forms of ser. Choice A, estoy, is conjugated for 'I, so you know that is incorrect as well. This leaves only est<span>á as the correct word.</span>
Yo soy Pedro Morales. Y soy de Nicaragua
El trabaja. Tú trabajas. Nosotros enseñamos. Ellos enseñan. Yo busco. Todos (ellos) buscan.
What are the options there is to choose from?