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:
was done at home in the nineteenth century
Explanation:
hello, i have just taken the test. your answer for part A would be ''the bird would rather fly free'' and for part B it would be ''for he must fly back to his perch and cling''. hope this isnt too late :^
