Select the letter of the answer that correctly identifies the subject and complete
verb in each sentence.
For a skilled tailor, sewing a skirt presents no problems.

In the Statement -For a skilled tailor, sewing a skirt presents no problems.-The Tailor is the Subject and the Sewing is a Action verb.

Explanation:

The letter Tailor is the Subject

Sewing a skirt is a complete action verb

The subject of a sentence refers to the person, place, thing, or idea that is doing something.So in the above paragraph it is the Tailor whois sewing a skirt.Action verbs are the verbs that  describes the action of the subject in the sentence. It is a type of Complete verb .These verbs provide a lot of information about the what is being done in the sentence. This  verb either shows action or state of being