Answer:
-1 ans +2 are the pair of integers whose sum is 0.
Answer:
C.
Explanation:
The elements involved in the evaluation of the presentation of a speech includes visual aids, vocal technique, and body language.
Adding vivid pictures in the presentation makes it graphic and proficient. The visual aids in presentation also provides the succinct and clear meaning of the message to the reader.
The vocal technique is another element that adds value in presentation. A speaker's confidence is reflected through his/her tone. It is the speaker's voice that becomes an influential tool that draws the audience's attention.
Body language, like vocal technique, helps in effective delivering of the speech. Body language is a non-verbal form of communicatin that communicates a lot to the audience than one can imagine.
Therefore, option C is correct.
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