8. The audience's educational level is a factor related to (1 point)
O reference groups
O demographics.
O psychology
O perception
9. Why is audience analysis important? (1 point)
O It helps you understand the audience as much as possible before giving your speech.
O It helps you know what stereotypes to use as you speak to them.
O It helps you to simply tell the audience what they want to hear.
O It is not important unless you need to drastically change your speech.

explanation:

may i ask what challenges?

conformal maps greatly distort _sizes_ of continents in higher latitudes.

the answer is sizes.

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.