Final answer:
The pronoun that correctly completes the sentence "El ___ fue a la tienda" is 'c) Él,' which refers to a singular masculine subject and translates as 'He went to the store.'
Step-by-step explanation:
The correct pronoun to complete the sentence "El ___ fue a la tienda" is c) Él. This pronoun fits the sentence structure because it is referring to a singular masculine subject. The sentence then reads "Él fue a la tienda," which translates to "He went to the store" in English. The pronoun "Él" is used for males, while "Ella" is used for females. "Ello" is a neuter pronoun often used for things or concepts, and "Ellos" is the plural form for males or a mixed group. Therefore, "Él" is the only pronoun that correctly completes this sentence with grammatical coherence and agreeing in gender and number.