What lines of latitude are all four civilizations within?​

Explanation:

The 30°north latitude line runs through the four ancient civilizations and is a mysterious and peculiar line of latitude. If we think carefully, we can know our planet Divided into two hemispheres:North and South, Continent plates are mostly concentrated in The northern hemisphere, the southern hemisphere is mainly ocean.

answer; all of the above are correct;

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.