My school is the
<span> oldest in our town, and it is three stories high" is the sentence with the faulty coordination. The age of the school has nothing to do with the height of the school. </span>
Code switching is when the language is arranged structurally and grammatically in other languages.
i am unsure what you mean by following the heard though.
A simple subject is the thing doing the verb, but excluding any extra details about the subject.
In this case, the subjects would be “men and melons”.
A simple predicate is just the verb, instead of the entire verb phrase.
In this case, the verb would be “are”.