17) C (Might be wrong)
21) D
22) The British, the French and the American Indians are major ethnic groups in Canada today. Due to the population growth, it may cause some health concerns, and immigration is responsible for the population growth, adding 1.7 million into the population, according to a study in 2011.
23) The United States has a constitutional federal republic and Canada has federal parliamentary democracy (Parliament of Canada) under a constitutional monarchy; a Commonwealth realm.
24) Natural resources because people would look for things they needed; like rivers for water, trees for wood, prairie for farming, etc.
25) Oil. Canada has the third largest known oil reserves in the world, behind Saudi Arabia and Venezuela. Canada takes on peacemaking roles. Maybe because they are bringing in quite a bit of money and don't have to spend time fighting anybody, so they can afford to spend time trying to solve world problems.
The correct answer should be that noise <span>distorts and obscures the sender's intended message.
Because of the noise, the person listening to you may not hear properly what you said, and thus miscommunication may ensue. If possible, noise should be avoided if you want your message to be received clearly and prevent misunderstanding.
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Philadelphia was the first city to celebrate independence day.
Hope this helps!