What is a musical form? How does it make music more interesting?

The phrase to every action there is an equal and opposite reaction is

Which of the following describes the multimedia era? a. an era in which artists created works using paint software such as photoshop, without actually programmingb. an era of interactive technology where 3-d computer graphics were used to create a virtual environmentc. an era in which most of the computer art work centered around computer programming

Answer quickly will mark as brainliest . what type of sculptures were created by the olmecs? how did they get the materials needed to make the sculptures?