Why and because usually go together not because they are similar but because why is the question that is used in order to ask and because it is one of the words that will be used to start explaining the answer. There are a lot of things that we may question in life.
Whenever we would ask a question about something, this may start with “Why.” It will then be answered with “because,” and hopefully, the explanation will be clear enough so that the question will be answered properly. When questions are not answered properly, confusion may take place. Miscommunication is also possible when this happens.