<u>My friend Estella Perez </u>likes outdoors, camping, hiking, and football.
In the example above, the complete subject of the sentence is <u>"My friend Estella Perez"</u> that refers to the person who performs the action (i.e. the doer of the action). Besides, the example is a complete subject which is formed by the simple subject or a noun plus its modifiers. In this case, "MY" is pre-modifier "FRIEND" is the noun of the subject and "ESTELLA PEREZ" are modifiers that function as a restrictive appositive (i.e. a restrictive appositive provides essential information about the noun of the subject and it is not between commas). The rest of the sentence forms parts of the predicate.
However, the question is, "What is a research?" of which the answer: "It is the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions" has been given.
