The water leapt up from the center of the spring. what is the subject of this sentence?

The water is the subject in the sentence.

Explanation:

In any sentence, there is always a subject though sometimes the object is not included. The subject in any sentence is the one doing the action/ verb or who/ what the verb is based on. So, the subject in the sentence is the "water" which 'leaped'.

In the sentence,

The water leapt up from the center of the spring

the water is the subject, leapt is the verb which describes the action of the water and the spring is the object.

d

explanation:

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.