Answer :
Well..., a lot of the choices we make in life can affect our family first of all. If you make bad decisions( which can be anything like doing drugs, getting into fights, etc.) it can give your family a bad name or effect how people treat your parents and siblings. On the other hand if you have done good things or made great achievements, people will look at your family with more respect.
Wells let see what it does, it is easy to choose a decision without thinking the consequences of later on. Most of times your decision is right to you while it is pulling down others in hurtful way. You might you choices are the best but indeed the lowest. They might suffer, struggle like if you end up joining gang. They might get depressed if you make your life out fool like dropping out of school, choosing the wrong person in your life( gf or bf). They might end up homeless as they spend their money in your wasting stuff. Your parent might divorce as one of them is supporting your decision while the other is against it. Hoped I helped.