1. it gives the problem faced by the main character
2. it gives the solution to the problem

c. movement because i took the test and it lets me review my answers

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

geologic time scale (for gradpoint) =)