"Could you explain this to me, please?" Remember that after "to explain", the next word is the mystery; the thing that you don't understand. 1) The collocations are "take [someone] to prison" and "take [someone] into custody". Pay attention to the prepositions. After an arrest, you are taken into custody. After a trial, you might be taken to prison. 2) Aggression is not a crime, but assault is. You are charged with [a crime]. 3) Racing who? There's no more information about that, so "speeding" is your only possible answer. The phrase you need to remember is "the police stop [someone] for speeding".

In #1, "custody" is correct because the preposition "into" can be used with "custody" but not "prison." We could say that the police "took him to prison" or "put him in prison" or "threw him into prison," but not "took him into prison." I'm sorry, I can't explain why. In #2, "assault" was correct because we are told that the fans were "charged with" something. A "charge" is a formal accusation that needs to be followed by the official name of an offense. An "assault" is a formal, official, legal word. Wikipedia says "An assault is carried out by a threat of bodily harm coupled with an apparent, present ability to cause the harm. It is both a crime and a tort..." "Aggression" is not the official name of a crime, or a misdemeanor, and someone cannot be "charged with" aggression. In #3, the correct answer is "speeding," again because it is the proper name of an offense. "Racing" is not necessarily an offense in itself. You can have a legally organized car race. For that matter, conceivably two cars could race each other without breaking any traffic laws. "Speeding" means driving faster than the legal speed limit.

1. custody is the state of being held by the police whereas prison is the place. you can be held in custody in a prison or a police lock up 2. they probably also exhibited aggression, but that is not the legal term. you can't be charged under law for aggression, but you can be for assault. you can be aggressive without having committed assault. 3. again speeding is the term for the legal wrongdoing. you can race without speeding or speed without racing. racing is used if you are having a competition to see who is the fastest or if you are in a rush. speeding is used if you are going over the speed limit.

The correct answer for #2 is Assault.