I guess formal and informal refer to two types of essay - you can write a formal essay where you avoid conversational language and such and where you need to be very professional, or you can write informally where you don't have to think about such things, it is very casual.
Answer:
d. all of the above
Explanation:
Disengage means to separate something from something else. When you detach, release, or free something from something else, you disengage it.
Answer:
between to combs in the bombs
