The girl were making colorful chalk drawing on the side walk

Here is your answer it should be 6.The girl were making colorful chalk drawing on the side walk

Explanation:

edit: It is a action verb since making is describing the subject's action,

The girl(subject)  action verb (making) colorful chalk

about the letter or who wrote the letter

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.