A study checklist is: a. An outline of key concepts b. A summary of key concepts written in short paragraphs c. A to-do list that includes exactly what you will use to practice for a test d. A mind map of key concepts

i believe the answer is: true

our brain need to reach a certain level of development   before it could interpret and understood sound with high difficulties. to proof this, we just need to pay attention in musical preference between children and adults. it is far less likely that children would enjoy things such as orchestra or rock band as much as adults due to the difference in this ability.

answer aggressive driving;