Final answer:
The sentence with an appositive phrase and a relative pronoun is: 3 Tiny, a Calico cat, is a close watcher of all who pass by.
Step-by-step explanation:
The sentence with an appositive phrase and a relative pronoun is: 3 Tiny, a Calico cat, is a close watcher of all who pass by.
An appositive phrase is a noun phrase that renames or provides additional information about a noun in a sentence. In this case, the appositive phrase is 'a Calico cat' and it provides additional information about the noun 'Tiny'.
A relative pronoun is a pronoun that introduces a relative clause, which provides more information about a noun. In this case, the relative pronoun is 'who' and it introduces the relative clause 'who pass by', providing more information about the noun 'all'.