Read the extract and choose the correct topic from the list.
This extract deals with …

... You should expect to find a lot of chemical ingredients in fast food. None of them are good for your health, but not all of them are bad. Chlorine is used to make bread white. Cochineal \(made from dried insects\) is used to make things red. However, more research is needed to find out exactly how these chemicals will affect our health in years to come.