B. is the correct answer.
Answer:Global warming is Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period
Explanation:
<span>It is unnecessary when you use a proverb or something that belongs to the domain of common knowledge.</span>
<span>In hierarchically structured organizations, communication between peers is called <u>horizontal</u> communication.
It is horizontal because it means that these peers are equal - so one person is not found above the other one because they are both the same - they are peers. If the relationship involved an employer and employees, that would be a vertical relationship and communication.</span>
Clause i think!!!!!!!!!!!!!!
