Identify the correct option to mark the part of the sentence that has an error.

(A) Energy use will having a negative
(B) impact on the environment if we
(C) don't change our consumer pattern
(D) No Error

Choose the correct answer from the options given below:

(A) Only

The reason for the error in part (A) is a subject-verb agreement issue. The sentence incorrectly uses "will having," but it should be "will have." The verb "have" is the correct form to use with "Energy use."