The use of appropriate language is very important. As an instructor, you should avoid:

The selected answer correctly identifies the importance of maintaining professionalism and appropriateness in instructor language. When instructing, it is essential to communicate in a manner that reflects respect for the learning environment and the diversity of students. Speaking as if one were casually conversing at the station can undermine this professionalism and may lead to misunderstandings.

Using informal language or expressions typical in a relaxed setting does not create the appropriate learning atmosphere necessary for effective teaching. It may also fail to engage students who are not familiar with such casual terminology, potentially alienating them or causing confusion. Therefore, adopting a more structured and respectful approach in communication fosters a better educational experience and encourages focus and engagement among learners.

The other choices highlight aspects of effective communication through appropriate tone and emotional expression, which can enhance the teaching experience when they are employed correctly.