Why do we have limited knowledge of pre-columbian art in the americas?

With which type of media are you interacting when you read an online shopping website

Who is responsible for making sure that the sound design plan in us u who is responsible for making sure that the soundesign plan in a theatrical production is feasible?

Which technique creates perspective in this image? a. altering color b. different planes c. difference in size d. overlapping objects e. difference in detail