Final answer:
The correct phrase to complete the sentence with parallel structure is 'excellent collaboration skills'. This maintains the adjective 'excellent' consistently before each skill set mentioned. Using parallel structure in sentences improves readability and clarity, which is especially important in professional communication and academic writing.
Step-by-step explanation:
To give the sentence parallel structure, the phrase that completes the sentence should match the structure of the items listed before it. In this case, 'Teachers must have excellent communication skills, writing skills, and excellent collaboration skills.' is the correct choice because it maintains the parallel structure by having the adjective 'excellent' before each skill set.
Revision of Non-Parallel Sentences
Incorporating parallel structure improves readability and clarity. For example, 'The required qualification is someone who writes well.' has a mixed construction, and the revision to 'The company requires someone who writes well.' corrects it by aligning the subject and verb effectively. Similarly, 'Nurses, an excellent career choice, involves an extra semester.' is not parallel because 'nurses' are not the same as 'nursing.' The revision to 'Nursing, an excellent career choice, involves an extra semester.' fixes the issue by correctly identifying the subject as the field rather than the practitioners.
Using parallel structure helps ensure that communication is effective whether it is in written reports or in communicating with research partners or team members. Being able to communicate clearly and draft effective sentences is crucial, and giving and receiving feedback is a part of the revision process that leads to more developed and comprehensive writing.