A widely accepted way of thinking or behaving is a convention.
It denotes set of generally accepted standards and norms and a way in which something is usually done. Example for convention is shaking hands when greeting someone. Controversial on the other hand is something causing people to have opposing ways.
Answer:
Constructing this new state-of-the-art swimming facility will take two years.
Hello. You have not shown the advertisement to which this question refers, which makes it impossible to create an answer with accuracy.
Nazi propaganda was created to convince people to support the Nazi regime, to help the Nazi government achieve its goals and to publicize Nazi concepts regarding race and sovereignty. These advertisements were very effective during the Holocaust, when the Nazis were able to convince people about the problem of allowing Jews to live freely and how they should be exterminated.