That whenever any form of government becomes destructive of these ends, it is the right to abolish it."
Answer:
True. However, those are not two types of discussion groups, but only one.
Explanation:
Online forums possess a tree-like structure. A forum can contain several sub-forums discussing topics somehow related to the original subject.
Forum conversations differ from chat, because messages are typically longer, and are stored for longer. Each conversation in an online forum is called a "thread".
A bulletin board is a<em> type </em>of online forum in which its participants post questions to a related topic and other members try to provide the answer to that question. The answer is open to discussion and other members are free to intervene and correct the answer, if needed. A moderator is usually present, to ensure ethical behaviour and encourage the participants.
In most cases, the engineered works will have a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels, often just called levels.
