A pen
Food
Scissors
Book
Headphones
Phone case
Answer A is right, It is difficult to approach the fire as smoke is accumulating all over the ceiling and the heat is also so great. it is due to the smoke all over that the visibility is also low so the use of portable extinguisher is not required here. special personal protective equipment will be required here.
Answer:
Differences in facial expression
Explanation:
There are 7 types of facial expressions each of which has its own uniqueness.
Difference in facial expressions do not hinder non verbal communication because facial expressions have proven to be an effective means of communication in the absence of a common language.
Though, it can be a very strange "exercise" and energetic gesturing but all emotions shared via facial expressions are universal and there won't be any difficulty in understanding them.
The answer is C: formal and respectful.
In any speech the orator should strive to achieve a formal and respectful tone. Formal speech is characterized by being concise, direct, and well-structured to be as meaningful as possible in order to avoid ambiguities that could lead to miscomprehension. It should also be respectful in tone because it is addressed to school authorities, and all authority figures, by their own merit deserve a courteous and polite address.