They give more/additional information about a certain topic of research.
They help learns to know what they may expect to see on the field
Answer:
1: the black lines on the map identify the separate tectonic plates.
2: the arrow shows the direction of the movement of the tectonic plates and what plates might be over lapping each other and what might draft away from each other.
Explanation:
C, the separation of Church and State
Id say b because for a while it had no real population
