I think it does because people tend to shorthand words like "for" to "4" and "you" to "U." sometimes people become overreliant on stuff like that and they use it even in school or in situations where the shouldn't. grammar online is pretty bad in general too.
The correct answer is 3
Stuart is walking past his bedroom door and accidentally slams his elbow into the door frame. The pain is sharp, immediate, and intense. The next morning his pain is a dull ache that bothers him throughout the day. The initial pain Stuart felt was caused by <u>fast</u> fibers, whereas the pain he felt the next morning was caused by <u>slow</u> fibers.
Large quantities of potatoes were imported by Europe as a result of the Columbian Exchange and the introduction of a new variety of seeds helped the growth of potatoes.
True, the nonverbal messages listeners send back is called feedback
