Ms. brown always ends group work activities by standing at the front of the room facing students and turning on the overhead projector. ms. brown is using this position and behavior to:

signal appropriate student behavior.

Explanation:

Using nonverbal signals can create a communication that is done swiftly,quietly and discreteely.Signaing means you don't have to shout to the students when you send the message but you just use the body langauge or non verbal communication.

It is a silent way of saying this si what I need to see happening now without saying it in words.

Ms Brown here is using signaling to actual tell the groups that the group work time is over and they now need to focus on the projector as she continues with the lesson.

a. the moon was locked into orbit by the earths gravity as it was passing by and capture hypothesis i think

its d i know cause i've been googling it