Ateacher who wants students to elaborate on the material they are studying would be well advised to

They will be advised to ask higher level questions that would be of help in determining whether his or her students understands the material that they are understanding. Interacting with them in a way of asking questions will help the teacher understand if the students has absorbed the information in their book and if he or she needs to clarify more things regarding about the topic.

Yes you are cute answer theories to explain the colonization of the new world the last great habitable landmass to be occupied by humans focus on the bering land bridge, or beringia, which emerge by siberia and alaska the last ice age.