Because rusting make the steel's structural strength became weak.
In construction, we use steel as a foundation that hold the building's structure. If we don't guard against the rusting of steel, we will expose the building to a very high potential risk of collapse
Answer: Yes, the ones who responded are significantly different from the ones who did not respond and it could have skewed the results of the survey as well.
Explanation:
In survey sampling exists something called Non-response bias, occurs when people selected to complete a survey are unable to do it. In some cases, they are too busy, unwilling, or just don't like completing surveys. Indeed, Nonresponse bias usually occurs when the ones who responded are different in many ways from nonrespondents. With a response rate around 10%, the results are not trustworthy, skewing too much the information obtained in the collected surveys.
Violence against children usually comes in the form of physical violence, of course, it does leave a lot of psychological trauma that often comes out later during the life of that child. An example would be forcing children to work and beating them up if they don't. An even worse example that is sometimes common is forcing them to join the army and having an army of children. These are serious human rights violations.
