I believe the answer is: Threshold
In communication process, volume threshold refers to the bare minimum of volume power that needed for a message to be transferred from one person to another. The threshold within communication mainly influenced by two factors, the voice volume of the sender and the noise level within the environment surrounding the communicators.
The correct answer is "<span>two-thirds of adults".
Siblings are individuals who has one or both parents in common with each other, or in other words they come from one family. Siblings are mostly close to each other and sometimes it depends on how they are raised, sometimes siblings may be greedy or selfish to one another, yet it is up to their parents on how they will be treated and how siblings will treat their brothers or sisters.</span>
If I had written your question in English, I could have helped you
Answer:
D.
Explanation
because they need to be imported d would be the correct answer
